The book of life reference is related to the nephilim, and the replicants without souls. Those people were not of God, and not in the book of life. The Lamb's book of life is the book you speak of. You cant' change anything about the book of life, other than accepting the mark of the beast or getting any of the DNA modifying 'cures' the elite are about to offer. Anything that fucks your DNA takes your free will and ticket out of here.