Lou Book order (chronological)

Dear Mr. Henshaw, Leigh Botts has been author Boyd Henshaw's number one fan ever since he was in second grade. Now in sixth grade, Leigh lives with his mother and is the new kid at school. He's lonely, troubled by the absence of his father, a cross-country trucker, and angry because a mysterious thief steals from his lunchbag. Then Leigh's teacher assigns a letter-writing project. Naturally Leigh chooses to write to Mr. Henshaw, whose surprising answer changes Leigh's life.