Darkness for Light (Caleb Zelic #3) by Emma Viskic

All he trusts is betrayal...

After a lifetime of bad decisions, troubled PI Caleb Zelic is finally making good ones. He's in therapy, reconnecting with the Deaf community, and reconciling with his beloved wife.

But he can't escape his past.

A violent confrontation forces Caleb back into contact with his double-crossing partner, Frankie. When her niece is kidnapped, Frankie and Caleb must work together to save the child's life. But their efforts will risk everything, including their own lives.