''Twas the night before Christmasand 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!Longlisted for the Klaus Flugge Prize 2025