Harlequin's Riddle by Rachel Nightingale

When Mina joins a troupe of travelling actors, her aim is to find her missing brother, but her search unlocks a series of secrets that will change the world she knows forever.

Tarya, the mystical realm spoken of in tales, is real, and her gift for story telling opens a way to it. But Tarya has a shadow side, and someone in the troupe of actors is using it to harm people. Mina soon realises she may be the only one with the power to stop them. Harlequin’s Riddle is the first book in a Young Adult fantasy trilogy about the gift of creativity and where it can take you.