From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation!

April Fool!Karen loves April Fools' Day. That is when she gets to play tricks on her friends. First she squirts Pamela with a fake camera. Then she puts a plastic cockroach in Bobby's shoe. But now Karen has come up with a joke to play on her whole big-house family. Could this be her best joke ever? Or is Karen in for a big surprise?