Hi there,
at the moment you can get 33 books / audio books for WH40k and WH at humble bundle for about 15$.
[URL="https://www.humblebundle.com/books/tales-from-the-worlds-of-warhammer-books?hmb_source=navbar&hmb_medium=product_tile&hm b_campaign=tile_index_2"]HUMBLE BOOK BUNDLE: TALES FROM THE WORLDS OF WARHAMMER[/URL]
Regards
AlphaRonin