Keeping Score (Clarion 2008) by Linda Sue Park gives a view into the world of Brooklyn in the 1950s. Maggie, named after Joe DiMaggio, is a Dodger's Fan along with the rest of her neighborhood. She becomes friends with Jim, the new fireman at the station who is "gasp" a Giant's fan. When Jim goes off to the Korean conflict, Maggie writes letters and sends him games she's scored. But then Jim quits writing back . . .
This book not only kept my attention, but I also felt I learned some history in a very painless fashion.
Linda Sue Park is a Newbery Medalist for A Single Shard. Check out her website to learn more.