The free ebook is Cthulhu's Daughter and Other Horror Tales. The tentative release date is set for the 2nd week of November. It features stories with robots, werewolves, zombies, Old Ones, and a few surprises. Though several stories were published in other anthologies, they've been revised. A couple of stories have never been published before.
To get a free copy of my new short story collection, just purchase an ebook or paperback written by yours truly between October 29th and midnight October 31st and email the receipt to email@example.com. On release day, we'll email you a free ebook in mobi, epub, and pdf.
In other words, buy one, get one free!