Switch Bidder by Sara Ney

About the Audiobook:

Piper has been crushing on Ryder for years. What better chance to make her move than when he’s sacrificing himself to the squealing masses at a charity auction? Too bad she’d rather chug nails than actually bid on a guy who doesn’t know she exists. Or so she thinks…

In a twist of fate, Piper wins Ryder at the auction, but she never collects. 

Now he’s determined to find out why.

Narrated by Felicity Munroe & Jason Clarke