'The Christmas Surprise' is the third book in 'The Jess Mystery Series'. Jess and her best friend Ruby and the rest of Class Three are very excited about the Christmas Concert at 'Oakhill Primary School'. On the day of the Concert Mrs Duster realises that her cat Poppy has disappeared. The children search everywhere in the school, but they cannot find her. When strange noises are heard during the Concert, the children begin to wonder if Poppy is trapped somewhere nearby. Will they find Poppy?Are they in for a big surprise?