Here is a nearly-complete collection of the Werewolf: The Apocalypse 20th Anniversary Edition ebooks in PDF format.

Included:

W20 - Book of the Wyrm
W20 - Core Rulebook
W20 - Cookbook
W20 - Changing Breeds
W20 - Character Sheet
W20 - Rage Across the World
W20 - Songs of the Sun and Moon
W20 - Tribebook: White Howlers
W20 - Umbra: The Velvet Shadow
W20 - Wyld West Expansion Pack

Note: the Rage Across the World ebook is, in fact, the 20th Anniversary version; previous W20 torrent collections mistakenly included the original version from 1993 or whatever. 

This collection is only missing two items:

W20 - Poison Tree (novel)
W20 - Art of Changing Breeds: A Visual Guide to the Fera (art sketches etc.)

It also doesn't include any of the mediocre wallpapers DriveThruRPG wants a dollar for. 

I believe more W20 books are planned; if and when new books are released I will create a new torrent with those items. However, I'm not going to spend the money on what amounts to a fanfic novel nor the leftover art scraps from the Changing Breeds book, so unless someone else will share Poison Tree and Art of the Changing Breeds, I won't be including them in my collection.

Enjoy!