Ottoline and Mr. Munroe do everything and go everywhere together. That is, until the day Mr. Munroe mysteriously disappears leaving a strange clue written in string... Armed with her Amateur Roving Collectors' travel pass Ottoline sets off on a journey over, under and on top of the sea to find her hairy best friend - and bring him back home. Ottoline at Sea is the third enchanting Ottoline adventure from Kate Greenaway award winner, Chris Riddell