Knock Three Times! by Marion St. John Webb

Molly is desperately disappointed when, instead of the longed-for silver bangle, her Aunt Phoebe sends her a small, grey, pumpkin-shaped pincushion for her birthday. But at night, when the full moon shines, the pumpkin turns out to be a magical one. It leads Molly and her twin brother Jack into a strange land and an extraordinary quest which is by turns thrilling, chilling and hair-raising. This eerie tale of high adventure has an enduring appeal to all who love to have their blood deliciously curdled.