Solomon and Mortimer by Catherine Rayner

Two bored crocodiles are in the mood for mischief and decide to target an
unsuspecting hippo with their plan. The pesky pair, however, are set to have the
tables turned on them when it comes to light that the hippo is not as ignorant of their
trick as they thought. Lovely illustrations enrich this light-hearted watery tale penned
by the Carnegie award winner.