The hot new trend is to release books for free online under a Creative Commons license. This pleases me, as I am on a budget. However, I do buy hardcopies of these authors' books whenever I can (I have all of Cory Doctorow's, and more than one of Stross's and Munroe's), and recommend that you do so as well - you like the stuff? Keep the authors solvent!
But here you go - free samples.
Down and Out in the Magic Kingdom
Eastern Standard Tribe
A Place So Foreign and Eight More
Someone Comes To Town, Someone Leaves Town
Flyboy Action Figure Comes With Gasmask
Enjoy, and happy $WINTERHOLIDAY!