I picked up a copy of "Eat more Weight Less" Dr. Dean Ornish. This is a decent book. Although I do not totally agree with the super low fat approach. The book is worth reading. Basically this is a vegetarian approach to dieting.. he really does not want you to eat even lean chicken.. but only that if you must. I like veggies but I really enjoy lean chicken. The book has tons of recipes .. almost 300 pages of them. I think this is good.. to me it shows he is really trying.
It also talks about the therapeutic issues involved with weight gain. A whole chapter devoted to the emotional issues of weight gain, eating...etc. This chapter makes the book worth getting.. especially if you get it at a used book store.
If you love vegetables, fruit, and beans.. and can live without meat.. you will like this diet.