Elizabeth Singer Hunt 
Jack Stalwart: The Hunt for the Yeti Skull 
Nepal: Book 13

Jack Stalwart may be a top rock climber, but no amount of practise can prepare him for the most gruelling climb of all: Mount Everest. When a skull believed to be that of a yeti is stolen by an evil collector of curiosities, Jack must brave one of the most inhospitable places on earth to retrieve it…