Dawn of the Jaguar by Terry Spear

Erin Chambers is leaving the FBI to join her father in his Big Cat Investigative Agency. She loved her job, but she wants to be closer to her father and have more freedom to run as a jaguar shifter when she can. But she knows dealing with her dad’s sole private investigator, Jason Biggerstaff, is going to take some work. He’s a hot jaguar and turns up the heat whenever he’s around her without any effort at all, to her consternation. But he’s not fond of the FBI, and she and he butt heads all the time. He’s been like a son to her father, so she knows he was thinking he could take over the business one day. That’s not happening.

Jason Biggerstaff is busy with investigations, not thrilled that Erin is joining the agency, but all that changes when they are embroiled in missing kids’ cases, their usual run-of-the-mill investigations, and she’s really good at her job. No matter how much he fights the attraction he has for her, it’s a losing battle. What starts out as just them handling their usual cases, turns into something worse—a shifter in trouble and they must save him without landing themselves in a worse mess than they already are, which includes dealing with this growing need to take their relationship to something they never bargained for.