The Wild Cards world is an alternate history universe created and edited by George R. R. Martin. It’s a gritty and grungy take on the superhero genre. I don’t usually play in other peoples’ creative playgrounds, but I absolutely could not refuse to be part of this one, because it’s SO MUCH FUN.
If you are unfamiliar with Wild Cards, but interested in checking out that world, Macmillan has released the first five Wild Cards books as an e-book collection. You can get it from Amazon for the Kindle here, or for all other electronic formats (Nook, Google Play, iBooks, Kobo, and eBooks.com) via the links on Macmillan‘s page.