You're looking for information on the "Libro de las Sombras" from Charmed and possibly a free PDF version. The "Book of Shadows" is a central plot element in the popular American television series Charmed, which aired from 1998 to 2006. The series follows the lives of three sisters who discover they are witches and use their powers to protect innocent lives.

If you're interested in the Charmed series, I recommend checking out episode guides, reviews, and fan sites for more information. For those interested in witchcraft and Wicca, there are many books and resources available that can provide a deeper understanding of these practices.

However, fans of the show have created unofficial compilations of spells, potions, and incantations inspired by the series. These can sometimes be found online, but be cautious when downloading content from unofficial sources, as it may not be accurate or safe.

If you're looking for a free PDF version of the "Libro de las Sombras" or "Book of Shadows," I have to clarify that there isn't an official PDF version available for free download. The content of the Book of Shadows is part of the Charmed franchise and is copyrighted.