''Christmas in Piano World'' is a wonderful time of year, but Grumper doesn't like Christmas. All that rushing around buying presents, going to parties, decorating the tree. What made it worse, he'd fallen out with Ned, and Ned had run away. Discover the real meaning of Christmas on an adventure with Grumper and is friends and enjoy Christmas songs and carols along the way. Joanna MacGregor's ''Piano World'' is a unique way to motivate young pupils; they won't know they're working hard and you will certainly never hear them complaining about piano practice again! ''Piano World'' is a series of story-based tutors that entice pupils into a world of piano exploration. There are colourful characters whose escapades provide the inspiration for new techniques and pieces with illustrations by the highly-acclaimed 'Stik', that will have children and adults chuckling with delight. Games and puzzles galore provide hours of fun at, and away from the piano, and are valuable built-in revision.