I have read Monroe's 3 books, and this one seems to be the most intriguing and enlightening. While his first book talks about the mechanics of Out of Body Experience ( written in the early days when he was still experimenting with it), this book talks about his Far Journeys to the outer realms of existence, out of time and space limitation, where he learns about the cycle and meaning of human existence (this will be the first time you read something like this from a rational straightforward perspective, without any religious conotations). Talks about human existence in time and space, and about existence outside of time and space. He meets a brighlty glowing enlightened being who knows everything about him (somewhat like his guide) who guides and shows him about life itself (most people who had Near Death Experience think that glowing being as their God, or Jesus, Allah, angels or whatever God they believe in, which Monroe many years later in his 3rd book 'Ultimate Journey' discovered who that glowing being truly is! You will be absolutely shocked and surprised!!)
In this book he uses a lot of new terms which he uses to describe the Non-Verbal Communication (NVC)(similar to telepathy) and Ideas he experienced and communicated in the out of body state, into verbal language (English) which we use to make sense of things. Spirits don't use languages like humans do, since language is a human creation!! That is the reason why he used many unusual terms, to generally describe the NVC to the reader. It actually isn't that hard to read, you just have to flick the pages and refer to his word list (only about 15 words) to look up what it means.