Who Stole The Hamster? (N. Griffin, Kate Hindley)

In the first book in this humorous mystery series, perfect for fans of David Baddiel, the school day begins like any other. But when the class realize their beloved pet hamster is missing, it's not long before Room 11 descends into paranoia-fueled chaos, natural suspects produce natural alibis, and motives remain unmotivated. Now it's up to Smashie and her best friend, Dontel to do some super-sleuthing and set things right again.