From Goodreads:

The hilarious and heart–warming story about a down–and–out kid who finds inspiration in his favourite baseball hero.

In Brooklyn, 1940, a wisecracking, baseball loving twelve–year–old boy, Joey Margolis, is in desperate need of a hero. His rich father has recently divorced his mother, leaving her all but penniless, and she is forced to move herself and her son to an Italian dominated part of Brooklyn, where he's the only Jew in the area. Constant abuse from other boys in the neighbourhood prompts Joey to send letters to Charlie Banks, an up–and–coming star with the New York Giants, asking for a home run so he can tell everyone that it was for him. Joey uses every trick in the book to get what he wants and the friendship that comes out of their simple correspondence will change them both forever.

This improbable friendship is woven together through letters, postcards, notes, telegrams, newspaper clippings, report cards and ticket stubs, and includes a colourful cast of supporting characters.