Hard Heart. Blackstone House Romantic Suspense, #8

Never date a musician, Serafina Hennessy's father always told her. But Rudd was a cellist, not a drummer. How bad could it be? Sera soon finds out when her ratbag of a boyfriend runs off with a rock star, leaving her homeless, unemployed, and thousands of miles from her family. Unwilling to hear "I told you so, " Sera takes the first new position available and finds herself working at The Justice Project, reviewing claims of innocence and working to right past wrongs.
Hardly her dream job, but there's one case she can't get out of her mind. On the surface, the Sykes conviction seems airtight, but there are pieces that don't quite fit. "Facts" that don't add up. Against her boss's advice, Sera falls down a rabbit hole of conspiracy theories, cover-ups, and deception in a case where nothing is as it seems. Convict Levi Sykes has made many mistakes in his life, he's the first to admit that.
Killing his friend and roommate Ruby Costello wasn't one of them. But someone had to take the fall, and his world was quickly reduced to a seven-by-twelve cell and a new bestie named Diesel. Life in prison isn't all bad-at least he doesn't have to deal with his toxic parents anymore-but he lives in fear that Ruby's killer will strike again. When Sera pays him a visit, his only goal is to save lives, but by pitting Sera against his former roommates, he opens a Pandora's box of trouble.
And as a decade-old mystery unravels, a new monster awakens, a Hydra whose reach stretches farther than he ever imagined. Once again, a woman Levi cares for is in danger, but this time, only his enemies can save her.