Hazel and Her Billionaire Tower by Catelyn Meadows

Falling for him again?
Not an option.

Hazel Strickland never knew her real mother. Finally, the connection she’s been searching for surfaces in the least likely place possible:
With her ex-boyfriend at his mother’s hat shop in Eureka Springs, Arkansas.
Thanks to the distinct, one-of-a-kind hats sold there—and the hat that is an almost exact match to the one Hazel’s birth mother left for her years beforeWesley and his mother hold the missing links to the answers she’s seeking.
But Wesley broke her heart. She can’t be near him, especially not since Wes seems to think they need to give love a second try.
Following the hat’s clues means more time with Wesley. She’d rather lock herself away in her mansion tower on Beaver Lake.
That’s the problem with towers, though. Being up so high makes the possibility of falling again way too easy…