Lewiński Piotr. Grammatica teorico pratica della lingua polacca, wyd. IUO, Napoli 2004
The book aimed at teaching functional grammar. It consists of 3 parts. The first one is for beginners and introduces basic grammatical problems (phonetics, Polish cases, tenses, numerals, pronouns, prepositions etc.) necessary for understanding the structure of the language and constructing simple and correct statements and phrases.
Lewiński Piotr. Oto polska mowa, Wydawnictwo Uniwersytetu Wrocławskiego, Wrocław 2001
It is a complementary course book for intermediate foreigners who are familiar with the basis of the Polish grammatical system.