A Traitor Among the Boys — Phyllis Reynolds Naylor

After all the trouble at Christmas, the Hatford boys make a New Year's resolution to treat the Malloy girls like sisters. But who says you can't play tricks on sisters? The girls will need to stay one step ahead of the boys, and are willing to pay big-time for advance information. Homemade cookies should be all it takes to make a traitor spill the beans. But which boy has loose lips?

Caroline's horrified about sharing her birthday with her enemy Wally, but is thrilled with her role in the town play. Don't ask how Beth, Josh, and Wally get roped into it -- just wait until showtime, when Caroline pulls her wildest stunt yet! As each side wonders how far the other will go, they unexpectedly find themselves facing a blizzard and worrying about their parents' safety. That's when the lights go out!