What Bumosaur Is That?

What Bumosaur Is That? (known in the US as What Buttosaur Is That?) is a children's encyclopedia written by Andy Griffiths in 2007 as a companion to Bumageddon, describing many of the fictional prehistoric species mentioned in Bumageddon: The Final Pongflict. In 2010, a new edition was released as A & T's Wonderful World of Stupidity-Vol 1.

ISBN 0330447521

Works by Andy Griffiths

Short story collections

Bad books	The Bad Book (2004) The Very Bad Book (2010) The Super Bad Book (TBA)
Bum trilogy	The Day My Bum Went Psycho (2001) Zombie Bums from Uranus (2003) Bumageddon: The Final Pongflict (2005)
Cat 'n' Cow series	The Cat on the Mat Is Flat (2006) The Big Fat Cow That Goes Kapow! (2008)
Just! series	Just Tricking! (1997) Just Annoying! (1998) Just Stupid! (1999) Just Three for Free! (2000) Just Crazy! (2000) Just Disgusting! (2002) Just Shocking! (2007) Just Macbeth! (July 2009) Just Doomed! (April 2012)
Miscellaneous	Killer Koalas from Outer Space (2011)

Novels

Schooling Around series	Treasure Fever! (2008) Pencil of Doom! (2008) Mascot Madness! (2009) Robot Riot! (2009)
The Treehouse series	The 13-Storey Treehouse (2011) The 26-Storey Treehouse (2012) The 39-Storey Treehouse (2013) The 52-Storey Treehouse (2014) The 65-Storey Treehouse (2015) The 78-Storey Treehouse (2016) The 91-Storey Treehouse (2017) The 104-Storey Treehouse (2018) The 117-Storey Treehouse (2019) The 130-Storey Treehouse (2020) The 143-Storey Treehouse (2021)
Miscellaneous	Fast Food and No Play Make Jack a Fat Boy (2006) What Bumosaur Is That? (2007) What Body Part is That? (2011) Stinky Stories