For those who have not seen it, the book is large (700 big pages) and lavishly illustrated with cartoons. Inside, it shows a map of the world, including various lost continents. The action takes place in Zamonia - which includes Hobgoblin Island!!!
The basic plot is: Bluebear is a little blue bear, found drifting in the sea in a walnutshell by the minipirates. They take him in until he outgrows their boat. He then visits a sequence of other locations (including Hobgoblin Island!!!) and meets strange creatures and has strange adventures. Because Bluebear has no history, the backstories have to be delivered by the Professor Abdullah Nightingale's Encyclopaedia - a la Hitchhiker's Guide to the Galaxy. In fact, this book owes more than a nod to Douglas Adams, and indeed Adams is given a near-anagram mention in one of the various lists of names. But the storyline is irrelevant. The joy of the book is in Walter Moers's imagination - creating such a range of characters and creatures - some of whom play musical instruments made of milk. There are whole worlds created, histories invented. The detail is immense.
This is sheer, unadulterated Edward Lear style nonsense. And the illustrations mean that, although the book is on the long side, it doesn't outstay its welcome. The ending is feelgood - as we know it will be from the outset - and I'm sure the novel will be well worth dipping back into even if it doesn't get read again from cover to cover.
There are plenty of worse ways to spend your money!