Book excerpt: The latest heart-warming book in the Guinea Pig Classics series. ''Twas the night before Christmas, when all through the house, Not a creature was stirring, not even a mouse' But sit down by the fire with some chocolates to hand, And you'll be welcomed into a magical land. There is snow and some moonlight; St Nick in his sleigh; There are reindeer and elves, and guinea pigs! Hooray! This classic Christmas poem, now told by guinea pigs, Will surely delight all with their costumes and wigs. For nothing's more charming than a pig in a hat, Especially a Christmas one, that's just a fact.