I picked these up at a used bookstore ages ago, since they had the three-volume set. My recommendation would be to familiarize yourself with just the table of contents that’s printed on the binding, and when you come across something adjacent in your day-to-day work (e.g. Search), review the papers in that section. Those books are an excellent snapshot of the field at the time.

I did wind up picking up Volume 1 this afternoon and starting to read some of it. It's a fascinating look back in time at some earlier days of AI. Which is right up my alley, as I'm pretty enthusiastic about studying the history of the field.