Michael Dahl 
Alien Snow [PDF ebook] 

On a winter day, a young boy visits a strange antique shop. The eerie shopkeeper tries to interest the boy in his personal collection of snow globes. The boy is polite, but clearly bored by the objects. Then suddenly, the boy finds himself trapped inside one of the globes, another prisoner in the shopkeeper’s collection. The boy must find a way to escape, or remain a trapped forever!