BREATHLESS DESCENT (4) by Lisa Renee Jones: Ex-Army Ranger Caleb Martin returns to Austin, Texas, to join the Crazy Aces skydiving team. He runs into his best friend’s younger sister, Shay White, who’s been carrying a torch for Caleb all these years. Their feelings for each other are complicated, partly because Shay’s parents took Caleb in after his parents died when he was a teen. There’s no denying their mutual attraction, but since they’re almost like stepsiblings, should they act on those feelings? This story is psychologically complex, which is perhaps fitting since Shay is a licensed psychologist.