“Field of Greens” and “The Greens Cookbook’ both make the cut.
I’ve made lots of recipes from both these books. They are EXCELLENT vegetarian cookbooks and worth having.
Lots of great recipes.
The next 2 are also keepers.
This is a classic and has all the basics you could ever want. I refer to it regularly.
Funny story behind this book. I got this book when I got married( not this one though). I used it for a few things but one time I was looking thru it and saw this recipe:
One of my few pleasant childhood memories is my mom making these at Christmas although she called them by their Polish name of Kruschicki Recipe | Allrecipes I believe this was the recipe. I used to make these at Christmas too but only every other year. I didn’t make them last year so maybe this year.
So, I think I’m getting into mostly the cookbooks I’ll be keeping butI may still have a surprise or two.
Tahoe Girl 
When I was a child I had a friend whose Polish father used to make krischickis. I loved them and my Mum loved them so my friend always brought a bunch to our house to enjoy. They were so good! Haven’t had them in forever – having been diagnosed with celiac disease years ago I guess I can’t eat them now unless I could find a gf version – but I absolutely loved them as a child.
Google gluten free krischickis. There are several recipes. Good luck!
I have that same Betty Crocker cookbook, but mine is in rough shape.