Leigh has been 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 in 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. (back cover)

Strider has a new habit. Whenever we stop, he places his paw on my foot. It isn't an accident because he always does it. I like to think he doesn't want to leave me. Can a stray dog change the life of a teenage boy? It looks as if Strider can. He's a dog that loves to run; because of Strider, Leigh Botts finds himself running — well enough to join the school track team. Strider changes Leigh on the inside, too, as he finally begins to accept his parents' divorce and gets to know a redheaded girl he's been admiring. With Strider's help, Leigh finds that the future he once hated to be asked about now holds something he never expected: hope.