I have both of Miss Vickie's cookbooks and got a Lorna Sass book when I got it. Mine is a stove top, does not do varying pressures, but has a fixed setting with my valve. They aren't as dangerous as they used to be because of all the safety features, plugs that release with excess pressure.
I am glad to hear that the Miss Vickie book is recommended, as I have seen some online recipes and cook books that have much longer cooking times and wondered about the discrepancies. That is why I asked for tried and true recipes, I can search on my own for recipes, but you never know what is really a good recipe. I have done more than one recipe online that was wrong.