This book will tell you everything you need to know but were too grossed out to ask about prehistoric butt-related life forms and the complex stenchology of their environment.
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Details
ISBN: 043992622X (pbk.)
ISBN: 9780439926225 (pbk.)
Physical Description:157 p. : ill ; cm.print
Publisher:New York ; Toronto : Scholastic, [2008], c2007.