The Lincoln Lawyer #3: The Reversal book by Michael Connelly

Longtime defense attorney Mickey Haller finds himself recruited to change stripes and prosecute the high-profile retrial of a brutal child murder.

After 24 years in prison, new DNA evidence means convicted killer Jason Jessup has been granted another trial. Haller takes the case on the condition that he gets to choose his investigator, LAPD Detective Harry Bosch.

Haller becomes convinced Jessup is guilty. Together, Bosch and Haller set off on a case fraught with political and personal danger. Opposing them is Jessup, now out on bail, his defense attorney who excels at manipulating the media, and a runaway eyewitness reluctant to testify after so many years.

With the odds and the evidence against them, Bosch and Haller must nail a sadistic killer once and for all. What does Bosch think? If he's sure of anything, it's that Jason Jessup plans to kill again.