Basically the book is an examination of the possibility that much of what is in the Bible was influenced by contact between people living at that time and a group of beings who may have been humanoid extraterrestrials or, I think, may have been survivors from an earlier regular human advanced civilization that predated the Biblical people.
The book examines closely things said in the Bible and notes that our present Bible is not the same as the original writing. The author points out how the meaning of words changes over time (and brand new words come into existence and some words don't get used any more.) He also points out that Hebrew is a language that didn't at the time used vowels so people who translated the Bible over time had to figure out what the vowels were.
Which means that some of their translations might not have actually been what the original writer meant. To add to that the Bible was not written originally in English. Or Latin. It was compiled together and the decision was made which books were going to be in the final version of the Bible and which weren't.
That means that some of the items that were left out of the 'official' Bible might not have had any importance or they might have been important but were kicked out anyhow.
Also, parts of the Bible are based on ancient myths which were used to develop stories specifically for a religious and political purpose. The story of the flood, for example, is way older than the Bible version.
One other thing. From what I have read elsewhere the material in the Bible was copied by hand by monks. There is a very strong possibility that over time changes were made either by accident or by purpose by those copying earlier versions. Essentially, what we have in the Bible today is the result of these changes, different takes on mythology, political influences and other things.
That doesn't mean it's useless, of course. There are parts that are really good and have good ideas on how people should behave. In my own opinion one of the most important parts is very simple. Do unto others as you would have them do unto you. If everyone followed this very basic concept the world would be massively different that it is today.
Now there is one major thing I question about the book and that is that these beings were not from the Earth in the author's opinion. If they were not from the Earth than they would have evolved on another planet with differences from the Earth that, in the long run, would have resulted in intelligent beings developing but not looking just like us.
For example almost all the stories of UFO encounters today involve beings that are somewhat like us but it is very easy to tell that they did not evolve on the Earth. This is why I think the beings were human survivors of a civilization that was advanced but something had gone wrong and the survivors were trying to help people of that time get their own civilization going successfully.
One other thing. The author discusses the Elohim from the Bible and says that there were a group of beings, not just a single God figure. He goes into this in considerable detail.
The book is difficult to understand in some parts because the author goes into great detail on the language itself, how it was interpreted and how it could be misinterpreted.
So, now after my own opinions, I'll summarize what I think are the most important part of what the author says. There are footnotes for each chapter. Below are the main points I noted but he goes into each one in considerable detail.
The Elohim, either aliens or survivors of a previous civilization, created humans with DNA work.
Sometimes smart people like Galileo get stomped on, basically, by others who want to toe the official/political line.
There are various groups of Christians and their Bibles are not exactly the same, some with more books than other versions. That just refers to the present version of the Bible.
The exact authors of the Old Testament are not actually know. The original wording was subject to later copy errors, rewriting and word changes.
Biblical texts were originally written with 4 consonants and no vowels.
He discusses how language is related to the cultural of a particular time.
The term Elohim can be singular or plural.
He notes very specific things in the Bible that are related to the topic he is covering at the time. For example, Psalm 92 refers to 'gods' indicating that there were a number of beings that were thought of as being gods meaning there was more than one single god.
The Ruach is a mode of travel. (It seems to have traits of a UFO/UAP.)
God made man in 'our' image. Our refers to more than one so is this another thing that supports the idea of gods, plural?
The name Adam might be generic for different beings being made so this might refer to the 'gods' making 'Adams' on other planets also.
Original sin is a theological concept, not something God specifically established.
The Book of Enoch refers to 23 different kinds of flying vehicles.
(When you consider all the things covered in the creation of humanity, the temptation of Eve, the expulsion from Eden, etc. and how God got angry there's something to consider. If God is all-knowing, as Christianity believes, then wouldn't God have known in advance that the thing with Adam, Eve and the Garden of Eden wasn't going to work out? Expelling them from Eden because they didn't not follow his rules is sort of add when God would have known from the start that they would not obey him/her/it/them.)
There might have been giants in those days.
Some of what is in the Bible came from earlier civilizations like the Sumerian civilization.
There's a lot about Moses, the people with him, and Egypt.
He discusses Noah's ark. (Some of the logical problems I see with this which is, by the way, based on even earlier mythologies and some type of major catastrophe is referred to in legends of various civilizations. If two of everything were to be brought onto the ark then it would have been a vast structure. How would people living at that time manage to travel great distances to other continents, for example, and gather two of every living thing. How did then get two examples of every animal in the ocean? How about microorganisms? How would suitable habitats for all of this multitude of different living things possibly fit into one ark? )
He discusses Angelology.
He discusses the Annunaki.
There are many instances in the Bible where God instructed certain people to go and kill others yet one of the commandments is Thou Shalt Not Kill. (One source I read indicates it should have been translated as Thou Shalt Not Murder which makes a heck of a lot more sense.)
The term Elohim does not mean one single 'god.' It's a plural term.
There's a lot more discussed in the book. The only thing I found that was annoying was the continual splitting of some words as in splitt-ing or contin-ual. I can't understand why this was not corrected before being published.
I think this was a really well-done, albeit complicated at times, work and I like the way he went into detail on each thing he was noting that were different from the 'common' belief system.