Charlie and Lola: I Completely Know About Guinea Pigs - Lauren Child

Penguin Books Ltd - <p>Lola is really, really excited about looking after the school guinea pig, Bert. Lola loves playing with Bert, and she and Charlie even build him his very own guinea-pig run! But when Bert goes missing, Lola soon discovers that she knows something about Bert that no one else has even thought of . . . A completely special Charlie and Lola story, now available in paperback.</p>