The Atlantis Crystal — M.L. Rigdon

Feisty librarian longs for the excitement of her youth, when she spent summers exploring the Amazon and Maya ruins with her controversial uncle. Hunky writer is looking for her missing uncle but is delighted to run into the niece instead. Putting on a macho guy act, he talks her into letting him tag along when the fascinating, kick-butt librarian sets off on a hilarious adventure to rediscover herself and rescue her beloved uncle.