Remember, Rapture is on sale at present (ebook only). Was $9.99, now $2.99. Kindle format also works on PC.
You can find it on Amazon US as a kindle here
Or Amazon UK also in kindle format here
On B&N as a nook book here
On itunes here (although, sadly, it's not on sale)
For print version, you can find it on:
Might ape here
phillip w. simpson
Phillip W. Simpson is an author of YA and children's books.