Tony Lewis 
The Quest for the Bone Idol [EPUB ebook] 

Yo ho ho, shiver me timbers, and other pirate-related sayings.
After Stitches wins a competition at The Bolt and Jugular, Ollie and the boys take a well-deserved break from the detective agency. As they embark on a cruise, it seems like fate might be finally smiling down on them.
But what begins as a relaxing holiday turns into a voyage of intrigue and mayhem on the high seas, as the intrepid explorers get in a mystery involving a strange relic, a dangerous enemy, and a rather bawdy crew of pirates with interesting beards.
Will Flug ever stop being seasick – and can Ollie & the gang unravel the mystery of the Bone Idol?