Thesaurus Rex - Express Edition by Michael Dahl

A huge creature unfolds itself from the pages of a thesaurus into an origami monster! Now, a young student is face to face with Thesaurus Rex, a dino-sized villain of synonyms. The beast seems unstoppable - until a Librarian enters the scene. But how can a Librarian fend off a foe that can transform into any word in the English language?
Binding: Paperback / softback