http://www.amazon.com/Mens-Health-Huge-Hurry-Stronger/dp/1605299340
Stupid name (it's published by Men's Health) but solid program. It's a total body training program, so I don't have "arms day" and that sort of thing.
Have had what IMO are pretty good success with it, gaining about 12-15 lbs in 6 months. Looking back, I can't believe I used to have to do assisted pullups, and now I do them with plates on a belt. Starting weight loss now, on the same program. The book has sections for weight gain (and an advanced version), strength gain (and an advanced version) and weight loss.
It's only $15, and comes with illustrations of all the exercises done. Give it a shot if you want to try something new, or if you're not getting anywhere with the 'blast a different muscle group each day" plans designed for steroid users
If you do follow it, do it exactly as designed or you'll overtrain yourself.