Books with author Ruth Gemmell

Twelve-year-old asthmatic Daniel stays with his bossy cousin, Amy, her mum, and two cats in the Scottish countryside during the Christmas holidays while his parents take a trip to sort out their problems. When Amy and Daniel make up an old jigsaw puzzle, the cottage and garden gradually change to resemble the Victorian cottage pictured on the box lid. In between searching for the missing Title Deeds of the cottage to save it from land developers, they complete the jigsaw and find a strange rhyming puzzle hidden within the box. What does it mean? Danny and Amy are trapped inside the Victorian jigsaw house on Hogmanay. Will they solve the cryptic written puzzle and find their way back to the present before it's too late to save themselves, the destruction of the woods, and their cottage?