I must admit that I've attempted to read other books pertaining to "Sethian" ideas over the years, and have found myself bogged down within them, not quite able to grasp this different way of thinking and perceiving regarding ourselves & our universe...
However, I found this book, by Susan Watkins, to be more down-to-earth, and therefore a bit easier to understand/decipher.
"Conversations With Seth" is a compilation of what went on during some of Jane Robert's classes during the 1970's. It includes specific dialogue between Seth and the various class attendee's, as well as such "topics"/"entities" as The Sumari & Seth II.
It explores the nature of our thoughts & our reality - including our beliefs about violence, sex, men vs. women, alternate realities, and much, much more.
If you are at all interested in Jane Robert's various "Seth" books, and/or are intrigued by the idea of alternate realities, and how our thoughts create the reality we are currently in, then I would higly recommend this book - it's a fascinating, thought-provoking read (to say the least).
I read this book when it was originally published in 2 volumes--however whether it is one or two books is immaterial. If you've read the Seth books you'll love this book!