Back when it was first published in the 70s, I got this book in support of my then-vegetarian lifestyle. It became my favorite cookbook (along with V2). I'm no longer a vegetarian, but I still love to cook and eat meatless meals a significant proportion of the time -- and these cookbooks are still with me, and this one (V1) is now in its fourth iteration.
The book itself may not last as long as you'd like, but the recipes and the philosophy and the chatty, friendly and personal dialog is as fresh now as it was 30 years ago.
Anna Thomas is a successful screenwriter and film-maker (e.g. Frida, El Norte) and has received an Academy Award nomination. She will probably end up being best known for her excellent cookbooks.
I have to go now, to make her classic Macaroni and Cheese. Yum.