Old school paper, Kindles, iPad/Pods/Phones, Sony and Kobo. The only person I know closely that has an eReader has a Nook so I made the special effort to go right to PubIt on Barnes and Noble, rather than using Smashwords as many do. I also did make a Smashwords edition to get it outside the Nook, Kindle and printed paper - it's meat grinding as I type this.
Actually, it's done. Huh - I passed. Where's all the tales of gloom and doom and cries of 'The Meat Grinder!'? It appears it is already for sale through Smashwords too - https://www.smashwords.com/books/view/177496
I'm not pushing a preference for SW in particular, just surprised it's so quick compared to the holding pattern I'm in with Kindle and Nook.I will say the printed word gets the nicest formatting with little biohazard symbols as scene breaks. The digital versions have to settle for a double carriage return.
The printed version will be available on Amazon after I receive my ordered copies, and I'll be opting for all countries they allow it to be offered in.
I'm working on a page for this site specific to the book for pre-prologue. A couple of my advance reviewers seemed to have a conniption that a zombie book not starting at the moment of infection is a rip-off. However, since my protagonist isn't a scientist or modeling to be a future action figure - she's intentionally normal - Vanna hiding, losing electricity, and bemoaning the loss of cell phone and internet service is not going to win readers.
In fact, this isn't much of a zombie book - it's more like a book that has zombies and a vampire, but it's really about the living, breathing people.