Beware of the Frog - walker books.
This was my third book with walker books, and by far the most complicated. The 'baddies' changed from various human archetypes, then four unattractive teenagers - which were vetoed.
Here are the UK/US covers:
Japanese covers:
Spanish and Catalan covers:
Endpapers :
Here are the three Ogre spreads :
Nearly finished. And at the very end of the book, all the characters are either DEAD or transformed - but not in a good way ...