Book excerpt: DIVSecond-grader Dawn Bosco must put her detective skills to the test in these four mysteries at the Polk Street School/divDIV /divDIVThe Mystery of the Blue Ring/divDIV /divDIVDawn Bosco and Emily Arrow used to be best friends, until Dawn took Emily’s unicorn. Even though Dawn eventually gave it back, Emily still won’t talk to her./divDIV /divDIVWhen Emily’s blue birthday ring goes missing after art class, the rest of the second grade accuses Dawn of stealing it. Dawn sets out to solve the mystery herself to prove she is innocent—and maybe get her best friend back./divDIV /divDIVThe Riddle of the Red Purse /divDIVWhen Dawn finds a red purse on the playground after school one day, she knows she’s also found a new mystery to solve. But after she puts up posters and makes an announcement on the loudspeaker, too many people are trying to claim the purse!/divDIV /divDIVThe only clues are a shopping list, some money, and some dust that looks like cookie crumbs. Dawn will have to figure out the riddle of the purse’s odd contents to find its rightful owner./divDIV /divDIVThe Secret at the Polk Street School /divDIVMs. Rooney’s second-grade class is determined to win the school contest by putting on a surprise play. Dawn Bosco will play Little Red Riding Hood, and Jason Bazyk will be the Big Bad Wolf./divDIV /divDIVBut someone is trying to ruin everything. First, Dawn hears a scary voice backstage. Then, the wolf suit goes missing. Dawn has to get to the bottom of the mystery in order to save the play and win the prize./divDIV /divDIVThe Powder Puff Puzzle /divDIVOne hot summer day, Dawn’s cat, Powder Puff, jumps into an open car window. Before Dawn can catch up, the driver speeds off!/divDIV /divDIVDawn is sad, but she knows she’s a great detective. It’s up to the Polka Dot Private Eye to track down the car, the driver, and Powder Puff./div