"Shaman Slayer" by Nathan Long will be published by Black Library (owned by Games Workshop) in October 2009
from Black Library...
"When Gotrek and Felix travel north to seek the remaining members of the Order of the Fiery Heart, they find themselves with new companions and allegiances. Of course, there are rumours of beastmen lurking in the Drakwald, but there is far more to the story than they could have imagined. When they discover that the malignant forces of Chaos are at work, Gotrek and Felix find themselves battling not only for their honour, but for the very future of the Empire itself."
to pre-order (paste below into your browser):-
blacklibrary.com/product.asp?prod=60100281071&type=Book
there's a short, free pdf extract of the book at the above address.
Image is © Games Workshop Ltd. All rights reserved. Used without permission.