Meet Christmas Tree Mouse - Santa's tiniest helper and the loveable hero of this charming new festive picture book adventure from Waterstones Children's Laureate Joseph Coelho.

'Twas the night before Christmas and all through the house, Not a creature was stirring, save . . . CHRISTMAS TREE MOUSE!

And she's on an important mission. A mission to help Santa! Every Christmas Eve, this tiny mouse brushes away Santa's snowy footprints, nibbles up the mince pie crumbs, and - most importantly - checks on her Santa HQ tablet that all the correct presents are under the tree.

But when Christmas Tree Mouse discovers that baby Ola has received the wrong present, it's a CATASTROPHE! Can she use all her special training and determination to save the day? And might Santa himself make a special appearance?

This charming and heartwarming picture book from Waterstones Children's Laureate Joseph Coelho and debut illustrator Farah Shah offers a brilliantly funny sneak peek behind the scenes on the most magical night of the year. The perfect gift for any child this Christmas!