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Sam's finally got what he always wanted - he's popular! He's owns the school's most wanted marble, kids sit with him at lunch and even Johnny Wilson has stopped calling him 'derr-brain'. Things are looking up at home too. When his new baby sister arrives, he'll no longer be a lonely, only child. But when Sam becomes the teacher's pet his popularity drops faster than a tomato in a lift. Soon even his best friend Gary won't talk to him, and the new kid at home is a crying disaster. Who knew that getting exactly what you wanted could be so painful?