Third-grader Aven Green has been solving mysteries for a whole monthcracking such cases as The Mystery of the Cranky Mom. But can this perceptive detective solve two cases at the same time? First her teachers lunch bag disappears. Then Avens great-grandmas dog goes missing. Fortunately, since Aven was born without arms, all the arm cells went to her super-powered brain instead. (Thats her theory.) This hilarious chapter book showcases a new side to Dusti Bowlings unforgettable protagonist.