Doctor Who: Summer Falls by Amelia Williams (so, is that a joint pen name or did Amy finally take Rorys name?) is published by BBC Books on Thursday 4 April, priced £1.99.
And the summary: In the seaside village of Watchcombe, young Kate is determined to make the most of her last week of summer holiday. But when she discovers a mysterious painting entitled The Lord of Winter in a charity shop, it leads her on an adventure she never could have planned. Kate soon realises the old seacape, painted long ago by an eccentric local artist, is actually a puzzle. And with the help of some bizarre new acquaintances including a museum curators magical cat, a miserable neighbour, and a lonely boy she plans on solving it.
And then, one morning Kate wakes up to a world changed forever. For the Lord of Winter is coming and Kate has a very important decision to make.