If you’re a fan of gripping crime fiction with strong characters and atmospheric settings, the Cassie Dewell series by C.J. Box is a must-read. This thrilling series, set against the rugged landscapes of Montana and North Dakota, follows the tenacious investigator Cassie Dewell as she tackles chilling mysteries and dangerous criminals. Whether you’re new to the series or a longtime fan, this guide will help you navigate the Cassie Dewell books in order, ensuring you experience her journey from start to finish. Let’s dive into this suspense-filled world and explore why this series captivates readers worldwide!
Why Read the Cassie Dewell Series?
The Cassie Dewell series, part of C.J. Box’s broader Highway Quartet, blends heart-pounding suspense, intricate mysteries, and a relatable female protagonist. Cassie, a single mother and determined investigator, evolves from a rookie to a seasoned detective, facing personal and professional challenges with grit and empathy. The series’s vivid settings—remote highways, oil boomtowns, and isolated wilderness—add a cinematic quality that pulls you into the story. With critical acclaim, including praise from Stephen King, and a TV adaptation (Big Sky on ABC), this series is ideal for fans of crime thrillers, such as the Joe Pickett series or Longmire.
To fully appreciate Cassie’s character development and the interconnected plots, it’s best to read the books in publication order. Below, we’ve listed all six books in the series, complete with summaries and why they’re worth your time.
List Of Cassie Dewell Books In Order: Series Table
Below is the complete list of the Cassie Dewell series by C.J. Box in publication order, presented in a table format for easy reference. This order is recommended to follow Cassie’s character development and the series’ interconnected storylines.
| # | Title | Publication Year | Synopsis |
|---|---|---|---|
| 1 | Back of Beyond | 2011 | Cody Hoyt investigates a murder tied to a Yellowstone expedition, with Cassie as his rookie partner. |
| 2 | The Highway | 2013 | Cassie and Cody hunt a serial killer, the Lizard King, after two sisters vanish on a Montana highway. |
| 3 | Badlands | 2015 | Cassie, now a deputy sheriff, protects a young boy caught in a dangerous drug ring in North Dakota. |
| 4 | Paradise Valley | 2017 | Cassie, as chief investigator, pursues the Lizard King after a failed trap costs her job. |
| 5 | The Bitterroots | 2019 | Private investigator Cassie uncovers dark secrets while defending a man accused of assault in Montana. |
| 6 | Treasure State | 2022 | Cassie tackles a con man and a treasure hunt tied to a cryptic poem in Anaconda, Montana. |
Note: Reading in publication order ensures the best experience, as the series follows Cassie’s evolving career and recurring threats like the Lizard King.
Cassie Dewell Books in Publication Order
Here’s the complete list of the Cassie Dewell books in publication order, as recommended for the best reading experience.
1. Back of Beyond (2011)
Synopsis: Investigator Cody Hoyt, a brilliant but troubled cop, suspects foul play when his AA sponsor is found dead in a burned-out cabin. As he digs deeper, Cody uncovers a trail leading to a killer targeting a Yellowstone Park expedition—where his son, Justin, is at risk. Cassie Dewell, Cody’s rookie partner, plays a supporting role in this intense introduction to their partnership.
Why Read It?: This book sets the stage for the Hoyt/Dewell dynamic, offering a mix of personal stakes and high-stakes action. The Yellowstone backdrop is as thrilling as the mystery itself.
2. The Highway (2013)
Synopsis: When two sisters, Danielle and Gracie Sullivan, vanish on a remote Montana highway, former investigator Cody Hoyt and his rookie partner, Cassie Dewell, take on the case. They uncover a pattern of disappearances linked to a cunning predator known as the Lizard King. Cassie’s instincts and determination shine as she races against time to save the girls.
Why Read It?: This is Cassie’s breakout novel, where she steps into the spotlight. The chilling premise and remote setting make it a page-turner you won’t put down.
3. Badlands (2015)
Synopsis: In Grimstad, North Dakota, the oil boom brings wealth—and crime. Newly appointed Deputy Sheriff Cassie Dewell faces a surge in lawlessness. When 12-year-old paperboy Kyle Westergaard stumbles upon drugs and cash after a car accident, Cassie must protect him while unraveling a dangerous web of dealers and gangs.
Why Read It?: Cassie’s growth as a leader and her bond with Kyle add emotional depth. The gritty oil town setting amplifies the suspense.
4. Paradise Valley (2017)
Synopsis: Cassie, now chief investigator for Bakken County, has been hunting the Lizard King for years. When her carefully laid trap fails, she loses her job and reputation. Undeterred, she pursues the serial killer alone, determined to stop him before he claims more victims.
Why Read It?: This high-stakes chase showcases Cassie’s resilience and resourcefulness. The Lizard King’s return keeps the tension sky-high.
5. The Bitterroots (2019)
Synopsis: Now a private investigator, Cassie is hired to defend a man accused of assaulting his niece. As she digs into the case, she faces hostility from the powerful Kleinsasser family and local law enforcement. Her pursuit of the truth uncovers dark secrets in Montana’s Big Sky Country.
Why Read It?: Cassie’s independence and moral compass shine in this complex mystery. The family drama adds a fresh layer to the series.
6. Treasure State (2022)
Synopsis: Private investigator Cassie Dewell tackles two cases: a con man who stole a widow’s fortune and a mysterious treasure hunt tied to a cryptic poem. As she tracks her targets in Anaconda, Montana, Cassie uncovers connections that lead to a dangerous showdown.
Why Read It?: This fast-paced finale blends adventure and mystery, with Cassie at her sharpest. The quirky Montana setting adds charm to the thrills.
Chronological vs. Publication Order
The Cassie Dewell series is best read in publication order (as listed above) because it follows the progression of Cassie’s career and personal growth. The chronological order aligns with the publication order, so you won’t miss key plot developments or character arcs by sticking to the sequence above.
Why the Cassie Dewell Series Stands Out
- Compelling Protagonist: Cassie’s blend of strength, vulnerability, and empathy makes her a standout female lead. Her journey from rookie to private investigator is inspiring and relatable.
- Cinematic Settings: C.J. Box’s vivid descriptions of the American West—Montana’s highways, North Dakota’s oil fields, and Yellowstone’s wilderness—create an immersive experience.
- Thrilling Plots: Each book delivers standalone mysteries while building an overarching narrative, keeping you hooked from start to finish.
- Critical Acclaim: With endorsements from Stephen King and awards like the Edgar Award, C.J. Box’s storytelling is top-tier.
Tips for New Readers
- Start with Back of Beyond: While Cassie is a secondary character here, it introduces Cody Hoyt and the series’ tone.
- Watch Big Sky: The ABC series adapts the Cassie Dewell books, offering a visual companion to the novels (though it takes some creative liberties).
- Join the Fan Community: Connect with other readers on platforms like Goodreads or online book clubs to discuss the series and share insights.
Where to Buy the Cassie Dewell Books
You can find the Cassie Dewell series at major retailers like:
- Amazon: Physical, eBook, and audiobook formats.
- Barnes & Noble: In-store and online.
- Local Bookstores: Support independent shops by checking availability.
FAQs About the Cassie Dewell Series
Q: How many Cassie Dewell books are there?
A: There are six books in the series, with Treasure State (2022) being the latest.
Q: Do I need to read the books in order?
A: Yes, reading in publication order is recommended to follow Cassie’s development and recurring characters like the Lizard King.
Q: Is the Big Sky TV show the same as the books?
A: The show is inspired by the series but includes changes to the plot and characters. Start with the books for the authentic experience.
Q: Are there more Cassie Dewell books coming?
A: As of August 2025, no new books have been announced, but stay tuned to C.J. Box’s website or social media for updates.
Final Thoughts
The Cassie Dewell series by C.J. Box is a thrilling ride through the American West, blending suspense, rich characters, and unforgettable settings. Whether you’re drawn to Cassie’s determination, the chilling mysteries, or the rugged landscapes, these books deliver on every front. Start with Back of Beyond and follow Cassie’s journey through all six novels for a reading experience that’s as captivating as it is suspenseful. Have you read any of these books yet? Share your thoughts in the comments below, and happy reading!
Looking for more crime thrillers? Check out C.J. Box’s Joe Pickett series or explore other authors like Linda Castillo for similar vibes.
