Sounds interesting and I wish you luck - however I am not much of a reader (of fiction) so I am unable to suggest anything for you. Granted when I was younger I enjoyed the Steve Jackson books (which I think yours is emulating) but I do not know of any modern ones to compare with.
Thanks for the reply, Liqua. It is the same idea as the old Steve Jackson books but with more scope and detail to the rules, content, and story. I think the replies here and the pretty poor showing on Nathan's gamebook KS are proving helpful in illustrating that this isn't really an idea that will sell enough to justify my 4.5K commitment. Will see how things develop over the next week or so, though.