A brand-new early chapter book series featuring Barbie "Malibu" and Barbie "Brooklyn" solving adorable animal mysteries. Includes illustrations on every page. When their summer jobs are unexpectedly cancelled, Barbie "Malibu" Roberts and Barbie "Brooklyn" Roberts start a business of their own: pet sitting for their neighbors! On their first day, Barbie and Barbie are excited to take Trixie the dog out for a walk. But when they arrive, she's nowhere to be found! Can these BFFs solve the mystery and bring Trixie home?