Packed with full-colour illustrations and diagrams and extremely informative entries.

Never again need you look like a fool when somebody asks you, `What bumosaur is that?' Features useful facts such as: Bum-headed idiotasaurus - consisting of one large bum with a smaller bum-head atop, idiotic in both looks and behaviour. Poopigator - just like an alligator, except browner. And smellier. Also includes important - and frequently sought after - information about the greatest bumosaur battles ever!

From a No. 1 bestselling Australian children's author and illustrator team.