Read Investigators Books In Order : Every Fan MUST Know!

By Kathy | Last Updated on May 21, 2026

Note: This page contains affiliate links. As an Amazon Associate, I earn from qualifying purchases when you click on the link, but you are not charged extra.

In the ever-expanding world of graphic novels and early chapter books, the Investigators series by John Patrick Green stands out as an exciting, cleverly written, and visually dynamic collection. Aimed at younger readers yet enjoyed by adults as well, Investigators offers more than just a compelling narrative. It combines elements of mystery, humor, and vibrant illustrations to create a world full of intrigue and adventure. The series follows two anthropomorphic alligators-Mango and Brash-as they embark on thrilling escapades in their quest to solve crimes and uncover secrets, all while utilizing their unique detective skills and forming an unbreakable bond of friendship.

The Investigators books aren’t just fun; they’re also an excellent introduction to a genre that blends graphic novel storytelling with an investigative twist, all wrapped up in a kid-friendly package. With a mix of visual storytelling, easy-to-read prose, and plenty of action, this series has quickly captivated a wide range of young readers. But before diving into these captivating tales, it’s important to understand the broader landscape of the series, including how to read the books, the chronological order, and the things that make it truly enjoyable.

List Of Investigators Books In Order

More On Investigators Books In Chronological Order

1. The Hound of the Baskervilles (1902)

Ah, Sherlock Holmes at his finest! This is one of the most iconic detective stories ever written. Holmes and Watson are called to investigate the mysterious death of Sir Charles Baskerville, whose death seems to be linked to a terrifying family curse involving a ghostly hound. Set on the eerie moors of Devon, it’s a chilling story that combines suspense, atmospheric setting, and clever deduction. Holmes is at the top of his game, using all his skills to unravel a tangled web of secrets.

2. The Maltese Falcon (1930)

Dashiell Hammett’s classic hard-boiled detective novel introduced the world to Sam Spade, a no-nonsense private eye. The plot revolves around the search for a valuable artifact-a golden statue of a falcon-that leads to lies, murder, and betrayal. Spade is tough, but not without a moral code, and his sharp wit and calculating mind make him one of the most memorable characters in detective fiction. The twist-filled narrative keeps you guessing until the very end.

3. The Big Sleep (1939)

Raymond Chandler’s legendary private detective Philip Marlowe is at the center of this gritty, atmospheric tale. Hired to investigate a wealthy family’s troubles, Marlowe finds himself entangled in a world of corruption, crime, and murder. With Chandler’s signature style-filled with sharp dialogue, complex characters, and deep cynicism-this novel is a masterclass in noir fiction. Marlowe’s determination and sharp insights are the perfect match for the web of mystery he must untangle.

4. The Long Goodbye (1953)

Another Marlowe masterpiece from Raymond Chandler. In this one, Philip Marlowe is drawn into the mysterious case of a missing person and the complicated life of a man named Terry Lennox. As Marlowe delves deeper into the mystery, he uncovers dark secrets and confronts the corrupt world of Hollywood. It’s a beautifully written tale of loyalty, deception, and the struggle between good and evil, all wrapped in Chandler’s signature blend of melancholy and cynicism.

5. The Cuckoo’s Calling (2013)

Ah, here’s J.K. Rowling’s big leap into detective fiction under the pseudonym Robert Galbraith. The Cuckoo’s Calling introduces Cormoran Strike, a down-on-his-luck private investigator with a complicated past. Hired to investigate the apparent suicide of a famous model, Strike uncovers a world of celebrity, jealousy, and secrets. Rowling’s talent for creating complex characters and twisting plots is on full display, and Strike’s no-nonsense attitude and sharp intellect make him a great modern-day investigator.

6. The Silkworm (2014)

In this second book of the Cormoran Strike series, Rowling again delivers a gripping mystery. This time, Strike is hired to investigate the disappearance of an author, Owen Quine, who seems to have vanished after writing a scandalous novel about the people in his life. The twists keep coming as Strike uncovers layers of deceit in the literary world, and once again, his gritty determination and insight lead to an explosive, unexpected conclusion. If you liked the first, this one’s a must-read!

7. Career of Evil (2015)

The third book in the Cormoran Strike series takes the investigation to a more personal level. Strike receives a disturbing package containing a severed leg, which is a chilling clue leading him on a hunt to track down a vicious criminal from his past. The stakes are higher, and Strike’s relationship with his assistant Robin grows more complicated. The story is darker, with intense suspense and tension, and shows a deeper, more vulnerable side of Strike. It’s a thrilling continuation of the series.

8. Lethal White (2018)

In Lethal White, Cormoran Strike and Robin Ellacott find themselves embroiled in a complex mystery involving a politically motivated murder and a disturbed man claiming to have witnessed a crime as a child. As they dig into a high-profile case tied to the British political scene, they face increasingly dangerous situations. This book blends a deep, emotional storyline with intricate plotting, and you get to see more of Robin’s growth as a character, which makes it even more compelling.

9. Troubled Blood (2020)

By now, you’ve probably become quite attached to Cormoran Strike and Robin Ellacott, and in this fifth book, the stakes are even higher. Strike takes on a cold case involving the disappearance of a woman in 1974, and the investigation leads him through a tangled web of secrets, betrayal, and a dangerous criminal. The slow burn of this mystery is intense, and the chemistry between Strike and Robin is as fascinating as ever. This one is long, but packed with detail, rich storytelling, and plenty of surprises along the way.

Background On Investigators Books

The Investigators series, written by John Patrick Green, debuted with its first installment in 2020. Green, a talented comic book artist and writer, is no stranger to the world of graphic novels. His previous work includes Teen Boat! and contributions to Nerdy Birdy, but it’s with Investigators that he truly gained widespread recognition in the world of children’s literature. The series is published by First Second Books, a respected publisher known for producing engaging graphic novels.

Investigators follows the adventures of Mango and Brash, two alligators with contrasting personalities. Mango, the more logical and cautious of the two, serves as the grounded character, while Brash is bold, impulsive, and ready to leap into action. Their dynamic is one of the series’ strongest assets, as their friendship and teamwork form the heart of each story.

Set in a world where crime is rampant and mischief never sleeps, Mango and Brash are part of an elite detective agency known as the Investigators, tasked with solving mysteries, protecting the city, and-perhaps most importantly-finding time for fun. This unlikely duo, with their wit and charm, takes on challenges that are just as fun as they are mind-bending. As readers progress through the series, they’re introduced to new characters, villains, and a deeper storyline, all of which add layers to the series’ overall depth.

Reading Order Explained

One of the most common questions surrounding any book series is the proper reading order. While some series require a strict chronological order to fully appreciate the story, Investigators allows a bit more flexibility in how the books can be consumed. However, following the right order will certainly enhance the reading experience.

Here’s a detailed breakdown of the books in the series, in order of publication:

1. Investigators (Book 1)

   • The debut book introduces readers to Mango and Brash and sets the stage for the series’ tone and style. In this book, the duo embarks on their first big mission, attempting to stop a criminal plot while navigating various twists and turns. This book gives readers a taste of the humor, dynamic artwork, and mystery-solving elements that will define the rest of the series.

2. Investigators: Take The Plunge (Book 2)

   • In this sequel, Mango and Brash find themselves facing off against a new set of challenges, as the mystery deepens and the stakes rise. New characters are introduced, and the plot becomes even more intricate. While this book can be enjoyed independently, readers will find that it builds upon the world and character dynamics set up in the first.

3. Investigators: Off The Hook (Book 3)

   • Book 3 continues the adventures of Mango and Brash with even more high-stakes action. As the duo works to foil a new villain’s plans, the mysteries grow more complex, and their friendship is tested. Fans of the first two books will appreciate the deeper character development and the growth of the overarching narrative.

4. Investigators: All In A Day’s Work (Book 4)

   • This fourth installment sees Mango and Brash facing some of their most dangerous foes yet. A true test of their teamwork and problem-solving abilities, this book also explores new plotlines and deeper layers of intrigue.

5. Investigators: The Case Of The Cursed Dice (Book 5)

   • This book introduces more elements of fantasy and supernatural mystery, taking the investigation to unexpected places. The combination of magical threats and detective work makes this a standout chapter in the series.

While the Investigators books follow an overarching storyline, each book is designed to be both self-contained and part of a larger narrative. This means that while it’s beneficial to read them in order, it’s not absolutely necessary for understanding the plot. The earlier books lay a foundation for the later ones, but newcomers can easily jump into any book and follow the adventures of Mango and Brash without feeling lost.

What I Like About The Series?

The Investigators series has a unique charm that comes from its blend of witty humor, fast-paced action, and heartfelt moments between its two main characters. The relationship between Mango and Brash is the true heart of the series, and their contrasting personalities create a dynamic that feels authentic and engaging. Mango’s cautious nature serves as a perfect foil to Brash’s impulsiveness, and together, they balance each other out in a way that makes their partnership both relatable and entertaining.

The humor is another major highlight. The jokes are clever and often subtle, with enough slapstick and puns to keep younger readers laughing, while also delivering witty moments that will go over their heads but bring a smile to adults. This multi-layered approach to humor makes the books enjoyable for readers of all ages.

Another aspect I appreciate is the pacing. Each book keeps the action moving swiftly, with just enough tension and mystery to keep readers hooked. The series never lingers too long on one problem, and each chapter seems designed to keep kids turning the pages, eager to find out what happens next.

Visually, the books are a delight. John Patrick Green’s illustrations are colorful, lively, and packed with character. His dynamic panel layouts and expressive characters make the books a visual treat, enhancing the storytelling and making the action feel even more intense and engaging.

Finally, the series excels in making detective work feel fun. Mango and Brash are not just solving mysteries for the sake of it-they are part of a larger world, and their cases often feel like pieces of a puzzle that slowly come together. This sense of progression and adventure is incredibly satisfying.

Should You Read Investigators Books In Order?

The Investigators series is unique in that it doesn’t absolutely require reading in a strict order. As mentioned earlier, each book is designed to be an independent adventure that doesn’t rely too heavily on the previous one. However, there are benefits to reading the series in order:

1. Character Development: The characters evolve and grow throughout the series. The way Mango and Brash interact, their friendship, and how they face challenges all become richer the more you read. By reading the books in order, you witness their evolution firsthand.
2. Overarching Plot: While each book presents a standalone mystery, there’s an underlying story arc that grows more complex as the series progresses. Reading in order helps you follow this broader narrative, making the twists and turns of the later books more rewarding.
3. Worldbuilding: The world of Investigators becomes more intricate with each installment. New characters, settings, and elements of the plot are introduced, and having a clear understanding of previous books helps you appreciate these additions.

However, if you’re just looking for a fun adventure and don’t mind jumping into a new mystery, you can easily start with any book in the series. The stories are designed to be approachable and easy to pick up, so newcomers can dive right in.