This is a great introduction. I like the way that even though it's sci-fi, it's subtle sci-fi. I also like that the apocolypse isn't really an issue - it's something that happened in the past and is only eluded to by way of old news-reels and myth.
The characters are likable,and intriguing... From the sample chapter of Part Two it looks as though there are even more on the way!
This is an interesting book that was obviously a joy to write for the author. There were quite a few typos but that's ok - people give indie authors a hard time over this but they're writers after all, their passion isn't in the editing, they're storytellers first and formost.
Keep it up, this is a good book.