The Robe Of Skulls (Vivian French, Ross Collins)

All is not well in the crumbling castle high above the mountain village of Fracture. The sorceress Lady Lamorna has her heart set on a new robe. A very expensive new robe. To get the cash she will stop at nothing, including kidnapping, blackmail and more than a little black magic. But she reckons without the heroic Gracie Gillypot, not to mention a gallant if rather scruffy prince, two chatty bats, the wickedest stepsister ever, a troll with a grudge – and some very Ancient crones.