The Sunday Telegraph and HarperCollins Children's Books are giving you the chance to win all three books in the Stella Montgomery series (Withering by Sea, Wormwood Mire and Wakestone Hall) by author Judith Rossell. Eleven-year-old orphan Stella leads a miserable life with her three dreadful Aunts. But one night, she sees something she shouldn’t have and sets forth on an adventure more terrifying and more wonderful than she could ever have hoped for. For your chance to win, tell us in 25 words or less what your idea of the ultimate adventure would be and why? Competition has now finished, winners will be notified by email.