The case of the vanishing granny

Summary/Review: Billy, Fern and Joe Shortbread are the stars of their family circus, but they also have another talent ... they're experts at solving mysteries! When their circus moves into a new town they soon make friends with a young boy named Tom. But Tom can't enjoy the circus because his granny has disappeared and he's worried he'll never see her again. With the help of their astonishing circus skills can the Shortbread circus stars crack the clues and find Tom's granny? A brilliant McCall Smith adventure story, brimming with wit, wisdom and larger than life characters.