Ooooh. Today's free ebook from Tor.com is Jo Walton's "Farthing", which I've been meaning to read.
If you
sign up for Tor's mailing list, they've been sending out free ebooks in PDF/HTML/Mobi format for a few weeks. (And to date, that's the only mail there's been. It's not been in the least spammy.) So far, they've given away:
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Mistborn, Brandon Sanderson
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Old Man's War, John Scalzi
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Spin, Robert Charles Wilson
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The Outstretched Shadow, Mercedes Lackey and James Mallory
*
Farthing, Jo Walton
Next week will apparently be
Crystal Rain by Tobias Buckell. I haven't gotten around to reading any of them quite yet; I've got several library books I need to finish and return first, and honestly I find reading large chunks of text on a computer monitor to be pretty hard on my aging eyes.