Ashgate have some very good books, but they tend to be expensive hardbacks. They currently have a sale (not apparently applicable in the Americas, unfortunately) where all many books are down to £25 until 25 Oct 2011 – and authors/editors get a discount on that too (mail ehill@ashgatepublishing.com for the code if that applies).
Visit www.ashgate.com/sale2011 for full details.