Hi I am new and getting ready for RNY surgery soon
I bought the book "Experts Guide To Weight Loss" by Dr. Garth Davis before my surgery. It has a lot of good information and advice and follows closely to what my surgeon recommends.
Also, start trying out protein drinks and protein bars to see which ones you like. But do not buy too many. Your tastes will probably change several times through this process. Mine did. Your nutritionist should have guidelines about what to look for in protein drinks and bars. Not all of them on the market are healthy for us. In fact most of them are too high in carbs and calories and too low in protein. So start researching now.