Building a guitar, especially a hollow body from scratch is a big task, but it can be done. There are a few books that would be helpful, one I know of is Bill Cumpiano's, but also books like the Super 400 are helpful as the show different archtop bracing designs. However there is probably a newsgroup for guitar builders that would be great given how much help this newsgroup has been to me. You might want to consider why you want a hollow body guit sonically if you are thinking of bolting in a neck. I'd say try to pattern the guitar you build from one that you like. I'd also say that your first guitar will not be as good as the fifth or fiftieth you make. It might be fun if you have a minute to take a look at how Les Paul built his "log". He wanted it solid under the pick ups to increase sustain while retaining a hollow body feel. it's also good to remember that many 'hollow' guitars like the Gibson es-335 are not really hollow, but also solid under the pickups, bridge and tailpiece. Good luck and have fun, it's a cool thing to do!