Adler and Dwyer Books in Order

The Adler and Dwyer books are crime thrillers connected by Susan Adler, a New York State investigator, and Liam Dwyer, a former forensic specialist who becomes her consultant and partner in difficult cases. They work in and around New York, where quiet roads, wealthy suburbs, and close-knit communities can hide more than they reveal.

These are not cozy puzzles. The crimes are often personal, and the people closest to a victim are rarely free of suspicion.

The series develops in stages. What Have You Done puts Liam at the center when he becomes entangled in the murder of a former lover in Philadelphia. The case tests his marriage, his memory, and his relationship with his brother Sean, a homicide detective. I Know Everything shifts attention to Susan as she investigates the death of a philanthropist whose grieving husband may know more than he can admit.

By Don't Ever Forget, Susan and Liam are working together. A murdered state trooper leads them toward a missing nurse, an elderly patient, and old disappearances that have never been solved. Liam brings an eye for physical evidence and the perspective of someone who has been wrongly suspected himself. Susan is the steadier force, willing to keep pulling at a case even when every answer opens another problem.

Tell Me the Truth keeps the partnership at the heart of the story. When eighteen-year-old Jenny Moore is killed before leaving for college, Susan and Liam investigate her affluent Lewisboro family and the people around them. The more they learn, the clearer it becomes that the public version of a family can be very different from what happens behind closed doors.

Family loyalty is the thread running through these books. Brothers protect brothers. Parents conceal things from their children. Friends and neighbors decide what they can live with. Farrell uses those bonds to create tension, because a character's first instinct is often to save someone they love, even when that choice makes the truth harder to reach.

Each book has its own main mystery and can be read on its own, but reading in publication order gives the strongest sense of Susan and Liam's growing trust. Expect fast-moving investigations, shifting suspicions, and a fairly dark view of the secrets people keep when the stakes are personal.