I love my pressure cooker more every time I use it. The broth is just amazing, meat is tender and delicious and squash is cooked so fast. I use the Presto 307912 6-Quart Stainless Steel Pressure Cooker and have had great luck with it. It is easy to use, dishwasher safe and is pretty good sized for cooking large meals.
Miss Vickie’s Big Book of Pressure Cooker Recipes and Cooking Under Pressure (20th Anniversary Edition) by Lorna Sass are not Paleo cook books, but are still great references to have around when using the pressure cooker.