#CookbookBrowsing today....
I am back to one of the most used books in my bookshelves
Modern Pressure Cooking by Catherine Phipps.
Mostly it is used to check the cooking times for grains, beans and lentils. They have not always been perfect for my Instant Pot, but are a good starting point for me to work out my preferences. I've marked up the changes on those reference pages. Her times are much better than some other well-known/respected resources on the net. She also has a good range of lentils etc covered - other places often don't include the Indian lentils.
She also explains things really well. Like cooking them with salt and a little oil. How to quick soak using the IP. Which added ingredients slow the cooking time.
There are excellent recipes for these as well. Some of her "Pot of Beans" type recipes are very very good.
I love that her recipes are all timed for full natural release. I have found that results are better that way, especially with grains and lentils.