The continuing saga of free eBooks from Black Library on Fridays continues today with Trollslayer by William King. This is the first Warhammer Fantasy book they've offered. As always the book is available in both the .epub and .mobi file types.
While you're there to get that feel free to download the first audio book offering. They released it Monday, but as I wasn't expecting anything until today I didn't see it then. It's Horus Rising CD1, so I'm not sure how much of the book is covered in that file, but I plan on giving it a listen to see what it's like.