Mortimer Keene is full to bursting with madcap plans, and if it's trouble you're after, look no further! With laugh-out-loud illustrations, rollicking rhymes, and short chapters perfect for new readers, this fourth book in the series sees Mortimer Keene involved with DINOSAURS...
Mortimer Keene has invented a Time Machine! Soon the school is surrounded by dinosaurs. But what happens when a pterosaur grabs poor Emily Bruce?
