@HansEstrada; Unfortunately, the book, as held by FamilySearch, is protected and cannot be viewed on-line, as you have indicated.
FamilySearch does not sell books; however, there are a couple of resources that you might explore. I do see that this book is available to be purchased on Amazon.com. You might also try using WorldCat to find a the book in a nearby library. Try using the URL: https://www.worldcat.org/title/bernal-diaz-del-castillo-y-sus-descendientes/oclc/434324130?referer=br&ht=edition
Enter your zip code to find the nearest library that contains this book.
Best of luck in your search.
Why have you deleted your question and rejected @Mike357 's answer?
I think I hit a button by mistake, sorry. Mike's answer is valid.
Regarding my question itself, I was trying to delete it, since it was already answered (?)
Thank you. Good practice to leave your question in place once answered. It may help other users with similar questions.