Greenberg, Nicki

"This Christmas, Ruby has to bunk in at the zoo with the stuck-up antelopes and the fussy zebras, which is no fun at all for an excitable reindeer. So she comes up with a plan for fabulous Christmas festivities. But when her plan results in mayhem, how can Ruby right her wrongs and save Christmas for everyone?"--Back cover.

"If only Mrs Claus had listened! Letting Ruby lead the sleigh is a recipe for disaster. Ruby's wild ride lands her in a world of trouble, and very far from home. Poor Ruby is stranded, the presents are scattered...and the local penguins are very, very grumpy. How can the naughtiest reindeer avert a Christmas disaster this time?"--Back cover.

After Rudolf falls ill, Ruby, the naughtiest reindeer, must take his place and causes all sorts of mayhem.