Michelle Harrison was born in 1979 and grew up in Grays, Essex. She has a degree in illustration, and is a former Waterstone’s bookseller and assistant editor at Oxford University Press. She now writes full time and has a son, Jack, and two cats.

Her first novel, The Thirteen Treasures, won the Waterstones’ Children’s Book Prize, has been sold in over sixteen countries and was followed by The Thirteen Curses and The Thirteen Secrets. She has also published Unrest, a stand-alone ghost novel for teens and is now working on a second young adult novel. Her latest book is One Wish, a return to the world of The Thirteen Treasures.

Elissa Elwick collobrated with Philip Ardagh on the Little Adventures trilogy of picture books. She writes as well as illustrates, and is also the author-illustrator of The Princess and the Sleep Stealer and the Stick and Fetch series. She conjures up ideas from her home in Cardiff, Wales.