Book excerpt: From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Seeing is believingKaren loves unicorns. When she sees a poster for a circus with a "real live unicorn," she is gigundoly excited. Karen believes that unicorns can grant wishes. That is good, because Karen has some very important wishes to make. No one else in Ms. Colman’s class believes that the circus unicorn is real. But Karen does. Will her wishes come true?