If you're studying grammar, here are some general tips:

This is the exact or abbreviated title of the book. Users are not looking for a purely theoretical grammar book (like Bechara or Celso Cunha) nor a pure exercise book. They want the integrated model: learn the rule, then practice it immediately.

This is a critical ethical and legal question.

The book Gramática: Teoria e Exercícios by Paschoalin e Spadoto is protected by copyright (Lei 9.610/98 in Brazil). While many websites (e.g., Internet Archive, DOCERO, or fan-uploaded PDFs) offer the file for free, most of these are unauthorized copies.