Former homicide detective and star of Investigation Discovery, Joe Kenda follows his authentic and fascinating debut novel with First Do No Harm, another addictive tale of crime and punishment as only he can tell it.

A string of overdoses in Colorado Springs has Detectives Joe Kenda and Lee Wilson on the lookout for a bad batch of heroin that has been cut with a drug they've never seen before.

Meanwhile, at Springs General Hospital, Dr. Blair Moreland-the notoriously unpleasant head anesthesiologist-has found a way to feed his deepening addiction to the very same powerful new drug: fentanyl.

But when Dr. Moreland starts supplying the dangerous painkiller to dealer Lula Lopez-planning to manufacture the drug himself-he angers a Mexican crime syndicate and sets into motion a cycle of death and violence that threatens to engulf the entire city.

Detectives Kenda and Wilson must track down the source of this killer heroin before anyone else can overdose-and stop Moreland before he can escape the long arm of the law.