http://www.worldlanguage.com/Products/Polish/Kids|ChildrenBooks/Page1.htm

Or this one which is for bilingual English-Polish or dual language books, great tool for learning a language:

http://www.languagelizard.com/Polish_s/2735.htm

In big cities in countries there are international bookstores. In them are many English children’s novels written in polish.

They are good.

In Australia i know Abbey’s bookstore has some children’s novels in Polish, and you can order them in as well.

Go to Amazon.com as well. They have polish booksi think.

But international bookstores do, there are some in Australia, and probably other countries!