recipe books
Maytagbear is right on the money when he references Lorna Sass. I have four of her books devoted solely to pressure cooking.
Cooking Under Pressure (1989)
Complete Vegetarian Kitchen (1992) - has stir fry recipes, too
Great Vegetarian Cooking Under Pressure (1994)
Pressure Perfect (2004)
Her style is very conversational, upbeat. And while she has many traditional homecooking recipes (roasts, stews, beans), she takes pressure cooking to a new level: curries, risottos, interesting soups (for example, lentil with dried apricots.)
I have found her cooking times to be slightly understated, so I usually add two minutes to the cook time, and the recipes come out fine. She also gives pointers on how to cook a regular recipe in the pressure cooker.
I also have the Official Presto Cookbook, which has many good recipes. They are more on the order of Taste of Home.
For the above books I often substitute the called-for cut of meat with either boneless/skinless chicken breasts or boneless pork chops (all fat removed) and use the following cooking times: 7 minutes for the chicken, 13 minutes for the chops - letting the pressure come down on its own. The results are terrific. (the pork is so tender it flakes like fish.)
I'll pull a couple of my favorites, post them. I'm thinking apple pork chops, carrot soup, and lemon chicken. Yum.