From audible.com:

Unstoppable detective Harry Bosch returns in a new thriller from New York Times best-selling author Michael Connelly.

Harry Bosch is California's newest private investigator. He doesn't advertise, he doesn't have an office, and he's picky about who he works for, but it doesn't matter. His chops from 30 years with the LAPD speak for themselves.

Soon one of Southern California's biggest moguls comes calling. The reclusive billionaire has less than six months to live and a lifetime of regrets. He hires Bosch to find out whether he has an heir. Using all of his cold-case skills, Bosch pieces together a 65-year-old mystery and finds out that the case is not as simple - or as cold - as he thought.

Swift, unpredictable, and thrilling, The Wrong Side of Goodbye proves once again that "Connelly is still very much in his prime" (Washington Post).

"Bosch at his best."
- New York Times Book Review

"A Connelly novel is a thing of cool beauty."
- Chicago Tribune

THE WRONG SIDE OF GOODBYE

Harry Bosch is California's newest private investigator.  He doesn't advertise, but it doesn't matter.  His chops from thirty years with the LAPD speak for themselves.

Soon one of Southern California's biggest moguls comes calling.  The reclusive billionaire is nearing the end of his life and is haunted by one regret.  When he was young, he had a relationship with a Mexican girl, his great love.  But soon after becoming pregnant, she disappeared.  Did she have the baby?  And if so, what happened to it?

Desperate to know whether he has an heir, the dying magnate hires Bosch.  With such a vast fortune at stake, Harry realizes that his mission could be risky not only for himself but also for the one he's seeking.  But as he begins to uncover the haunting story, he knows he cannot rest until he finds the truth.

Swift, unpredictable, and thrilling, The Wrong Side of Goodbye shows that Michael Connelly "continues to amaze with his consistent skill and sizzle" (Cleveland Plain Dealer).