the Robe of Skulls: First Tale from Five Kingdoms

Trouble is brewing in the first book of the Tales from the Five Kingdoms series. The sorceress Lady Lamorna wants a skull-studded gown of deep black velvet but finds her treasure chest empty of gold. That doesn't stop her from kidnapping, blackmailing, and using more than a little magic to get what she needs. Will all her best-laid plans be foiled by the heroic Gracie Gillypot, two chatty bats, a gallant (if rather scruffy) prince, the wickedest stepsister ever, a troll with a grudge, and some very Ancient Crones?