X-link to the DRM-free megathread for this Tuesday's Wildside Press freebie:
My Lady Greensleeves, a vintage short science fiction novel by the late SFWA Grandmaster Frederik Pohl.
Also, Weightless Books are offering a free-with-any-purchase 4-issue subscription to one of their magazines, and they've a rather nifty collection of
Letters to Tiptree on sale for just 99 cents, which I believe is eligible for the Hugo nominations for this year, in case you were considering candidates for Related Work.