I haven't read most of these books, but I can tell you that Kelly Link's two books of short stories, Magic for Beginners and Stranger Things Happen, are totally worth the $11 on their own. She's one of the best fantasy writers in the business today. In addition to those two, you get Cory Doctorow's newest novel, Pirate Cinema*, the first book in a "modern military superhero saga" that "chronicles the battle between Earth's superheroes and a transdimensional Third Reich," and a highly promising novel set in an alternate-universe Johannesburg that stars a journalist with a sloth on her back. I don't think you can go wrong with this deal.
* Cory Doctorow is reading at University Book Store at 12:30 PM on October 23rd and at 7 pm at Elliott Bay Book Company on the same day, so you'll have plenty of time to read his new book before the reading if you buy soon.