The Christmasaurus 3 Books Set by Tom Fletcher (Christmasaurus, The Naughty List, The Winter Witch)

The number-one-bestselling, magical children's series from Tom Fletcher. This is a story about a boy named William Trundle and a dinosaur named the Christmasaurus. It's about how they meet one Christmas Eve and have a magical adventure. It's about friendship and families, sleigh bells and Santa, singing elves, and flying reindeer. It's about discovering your heart's true desire, and learning that the impossible might just be possible . . . 
Full of magic and music, humor and heart, and a friendship like no other, The Christmasaurus series is the most enchanting Christmas read for the whole family by Tom Fletcher.

Includes: The Christmasaurus; The Christmasaurus and the Winter Witch; The Christmasaurus and the Naughty List

The Christmasaurus:

This is a story about a boy named William Trundle and a dinosaur named the Christmasaurus. It's about how they meet one Christmas Eve and have a magical adventure. It's about friendship and families, sleigh bells and Santa, singing elves, and flying reindeer.

The Christmasaurus and the Naughty List:

This is a story about mischievous kids learning the error of their ways, but it's also about sharing the true spirit of Christmas and realising that sometimes things aren't quite as they first appear...

The Christmasaurus and the Winter Witch:

She is the best-kept Christmas secret of all,' whispered Santa Claus. 'Which is surprising, because Christmas itself would not exist without her. She is older than time itself, yet still as young as tomorrow. She is known only as the Winter Witch.'