MONEY YOU WON'T SAVE. FUN YOU WILL HAVE. That being said, I wouldn't buy a kit. I'd look at some of the offerings from sites like Lure Craft, Janns Netcraft, Barlow's, Bears, Caney Creek, Jacobs, etc. Find a mold that you want and buy it. Get some glitter and colorant and make some baits.
As for books, this site has more than any book can offer. Look in the don'ts for newbies and soft plastic cook book. There is a year's worth of reading there.