According to the Kryon material, this "Book of Life" is the Akashic Record ... stored in other dimensions of our DNA and written into the crystalline grid of Gia.
“Think of the soul as a large book with pages made out of light. On those pages is a secret tongue, and the tongue on those pages is symbols. If we wanted to break the code, maybe we could start perceiving these symbols as quantum fluctuations. Maybe what we think are symbols really are states of conscious fluctuation that are written on a single page. It looks like hieroglyphs but it isn’t. It isn’t the fire words of the Cabala but it is similar because each letter is saying something. The only way we break that code is when we understand that the formations of these letters are formations of quantum potentials.
“If you opened a book, read a mathematical equation, saw a drawing, and connected all of the keys in the drawing, you might come up with a template that looks like a bizarre figure. But if you laid it over the drawing – the drawing of particles reacting in the quantum field, or fermions and bosons attracted to some, denied by others – and looked at that and then read the description of what it is, perhaps that is what is in the Book of Life that no man can read, only the Holy Spirit can read.
“This is deep occult knowledge. Make no mistake: The book exists, and no flesh and blood can read what it contains. Only the Holy Spirit can read it. We understand what the Holy Spirit is, a quantum monad called mind. The soul then is endeavoring to configure this construction as a state that involves the configuration, the involution. The Book of Life configured all these states as experiences, and in experiences those states were given life. Those were the great engines of creation.”