Diane Duane and Peter Morwood's bank account got flat-lined by thieves yesterday, and there are bills on the way. So in the interim they are offering their ebooks at a 20% discount (if you use the coupon DDGOTSKIMMED), although there is no requirement that you accept the discount.
Diane Duane has written some quite popular fantasy books (although many are aimed more at the young adult market). Peter Morwood is probably less well-known, although I do highly reccomend his Widowmaker / Gray Lady series and I liked his Russian series quite a lot. [Although with name changes between US and UK editions, plus the collection of the books into anthologies leaves me wondering if I have read everything already or not. So I'll just have to buy them to see.]
Anyway, go take a look and buy a book.