What can you stack on the back of a yak?

Green, Alison

Stower, Adam

Notes
Captain Quack and his trusty yak deliver the post to the mountains and back. At least, that's the idea. But Yak keeps picking up friends along the way ... stranded baa-lambs, lost chickens and even some hitch-hiking rabbits! But just how much can Yak really stack on his back?
Location edition Bar Code due date
WENDOVER READERS TR13446