The Reversal by Michael Connelly

In this bestselling thriller, after DNA evidence frees a sadistic killer, defense attorney Mickey Haller and LAPD Detective Harry Bosch must put him behind bars before he strikes again. Inspiration for the #1 Netflix series The Lincoln Lawyer.?

Longtime defense attorney Mickey Haller is recruited to change stripes and prosecute the high-profile retrial of a brutal child murder. After twenty-four years in prison, convicted killer Jason Jessup has been exonerated by new DNA evidence. Haller is convinced Jessup is guilty, and he takes the case on the condition that he gets to choose his investigator, LAPD Detective Harry Bosch.