While all of my No Starch Press books are available at all the usual suspects, you can get a 25% discount (as well as put a little more money in my pocket) by buying direct from http://www.nostarch.com/ and using coupon code ILUVMICHAEL.
Remember, use the coupon code ILUVMICHAEL for your discount.
I get no additional royalties if you buy an anthology with my work in it, but I get warm fluffy fuzzy feelings when it happens.
You can also buy my short story Opening the Eye (from HLv2) on Kindle for a paltry $0.99.
My fiction is available from my Smashwords store. I make slightly more from Smashwords sales than other ebook stores.