what is the book of life about?

what is the book of life about is one of those mysteries though, in reality there are quite a few things known about the book of life, i think it is jesus who refers to the book of life being a record of all the names of souls and life itself.

wiki says this part,

"In the Old Testament, the Book of Life is the book or muster-roll of God, in which all the people who are considered righteous before God are recorded forever. God has such a book, and to be blotted out of it, signifies death"

"Every one that shall be found written in the book . . . shall awake to everlasting life"

so i the bookof life is not so much a physical book you can find on earth, but more so a book god has, but this is not to say you cannot read the book of life, as it is noted that the books of god can be read, through some kind of inner sight, this is said to be possible.

wiki

"Book of Jubilees

The Book of Jubilees[8] speaks of two heavenly tablets or books: a Book of Life for the righteous, and a Book of Death for those that walk in the paths of impurity and are written down on the heavenly tablets as adversaries (of God).

Also, according to ib. xxxvi. 10, one who contrives evil against his neighbor will be blotted out of the Book of Remembrance of men, and will not be written in the Book of Life, but in the Book of Perdition. In Dan. vii. 10 and Enoch xlvii.

3 "the Ancient of days" is described as seated upon His throne of glory with "the Book" or "the Books of Life" ("of the Living") opened before Him. So are, according to Enoch civ. 1, the righteous "written before the glory of the Great One," and, according to Enoch cviii. 3, the transgressors "blotted out of the Book of Life and out of the books of the holy ones." To this Book of Life reference is made also in Hermas (Vision i. 3; Mandate viii.; Similitude ii.); in Rev. iii. 5, xiii. 8, xvii.

8, xx. 12-15, where "two Books" are spoken of as being "opened before the throne, the Book of Life, and the Book of Death, in which latter the unrighteous are recorded together with their evil deeds, in order to be cast into the lake of fire." It is the Book of Life in which the apostles' names are "written in heaven" (Luke x. 20), or "the fellow-workers" of Paul (Phil. iv. 3), and "the assembly of the first-born" (Heb. xii. 23; compare I Clem. xlv.)."