Inside Man
- Judith D Collins
- Aug 18
- 2 min read
Head Cases #2
By: John McMahon
ISBN: 9781250348326
Publisher: St. Martin's Press | Minotaur Books
Publication Date: 01/13/2026
Format: Hardcover
My Rating: TBR (ARC)
In this sequel to McMahon's electrifying series debut, Head Cases, Gardner Camden and the PAR team return to investigate potentially connected cases.
FBI Agent Gardner Camden is an analytical genius with an affinity for puzzles. He and his squad of brilliant yet quirky agents make up the Patterns and Recognition (PAR) unit, the FBI’s hidden edge, brought in for cases that no one else can solve.
PAR’s latest case involves a militia group stockpiling weapons. When their confidential informant in the case is killed, it quickly becomes clear that the militia did not kill him.
As the squad looks into the evidence surrounding his murder, an unidentified man is caught on camera with their informant. This mystery man’s picture is connected to another case at the FBI, an unsolved series of murdered women, buried in the ground in north Florida. Could they have uncovered a serial killer? And if so, what is his connection to their C.I.?
As PAR juggles an investigation into both the dead women and the militia, they enroll a new informant, only to find the case escalating in dangerous ways. How will PAR handle a case that increasingly looks like a terrorist plot? And in the serial case, with no puzzles or witnesses, and few leads, how will a group set up to decode riddles be successful?
Head Cases (PAR Unit)
2 book series
HEAD CASES #1
INSIDE MAN #2
About the Author
The New York Times called John McMahon’s debut novel, THE GOOD DETECTIVE “pretty much perfect” and listed it among their “Top Ten Crime Novels of 2019.” The book was a finalist for the 2020 Edgar Award for Best First Novel.
His follow up, THE EVIL MEN DO, was also a New York Times “Top Ten Crime Novel” for 2020. The third book in his P.T. Marsh series, A GOOD KILL, came out in 2021 and was an Amazon Editor’s Pick for Best Mystery.
John’s newest book, HEAD CASES, came out January 2025 and INSIDE MAN Jan 2026 from Minotaur/St. Martin’s Press.
HEAD CASES was part of a six-way auction in Hollywood and is in preproduction at HBO MAX as a TV series.
John lives in Southern California with his wife, two kids and his rescue dog Tessie. In his day job, he’s an advertising creative director and is in search of the perfect chocolate chip cookie recipe.
