It's written by Ryszard Morawski and Andrzezej Nieuwazny, published by Pelta (firstname.lastname@example.org), ISBN 83-85314-18-0 . I bought it in May 2005.
When reading further, I see the name Pelta W Chojnacki as beeig owner of the copyright.
When I bought the four latest release, I got in touch with mrs Chojnacka. As you probably know, the end of a polish family name depends on the sex of the one you're talking about; "i" for men and "a" for women. So I guess they must know each other.