"Anjos Proibidos" is a popular Brazilian novel written by Leandro Karnal, and I'm assuming you're looking for information about the PDF version of the book. Here's what I found:

A significant portion of this book’s fandom consists of fanfic writers and literary analysts. PDF files are easy to annotate with apps like Adobe Acrobat or Foxit. Readers can highlight poetic descriptions of the angels’ wings, mark plot holes, or collect quotes about the theology of free will. This is much harder to do with a DRM-protected e-book.

Before clicking that shady “Download” button, spend 10 minutes searching for the author on Instagram or Twitter. Send a direct message asking if they have a legal PDF for sale. You might be surprised to find that, for a $5 donation via Pix (in Brazil) or PayPal (in Portugal), the author will send you a pristine, watermarked PDF directly.