Ascending Hearts — Leta Blake

Part of the Tempting Tales series.
Rumors of treasure have long sent fortune hunters clambering up a magic beanstalk to a mysterious castle in the clouds. Survivors told of an evil giant who guards the gold with savage strength. No sane man would dare risk the climb--but Jack has nothing left to lose. Shunned for his evil red hair and abandoned by his cruel lover, he's desperate to escape his life.

Rion isn't a giant, only a man bearing the burden of protecting his family's legacy. It's a lonely existence, but he's duty bound. Then Jack appears, and Rion's world changes. After a blazing confrontation, undeniable lust sparks. Isolated in the clouds, Jack and Rion give in to their desire and growing connection. Soon they must protect the treasure--and each other--from a new threat. And they have everything to lose.