bill, book, evidence, X learn(-ed) (-ing), letter, register, scroll

Boyd’s Bible Dictionary:

“Book” From Concise Bible Dictionary:

The form of ancient books was a long roll with a roller at each end. These rollers were held one in each hand and the book was unrolled from off the one and on to the other as the book was read; and this had to be reversed before the book could be read again. They were made of skins, and the writing was usually on one side only; to be written on both sides would show a full record (Ezek. 2:9-109And when I looked, behold, an hand was sent unto me; and, lo, a roll of a book was therein; 10And he spread it before me; and it was written within and without: and there was written therein lamentations, and mourning, and woe. (Ezekiel 2:9‑10); Rev. 5:11And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals. (Revelation 5:1)). The form of a roll explains how a book could have several seals, a portion being rolled up and a seal attached; then another portion rolled up and another seal, like the seven-sealed book of Revelation.
By the ancient nations records were made on cylinders or slabs of stone, or on clay, which was then baked or sun-dried. Many such tablets have been found in the excavations made at Nineveh, Babylon and other places. When Ezra was at work on the city and temple of Jerusalem his opponents wrote to the king of Persia asking that “the book of the records” might be searched for corroboration of their assertion that Jerusulem had been rebellious (Ezra 4:1515That search may be made in the book of the records of thy fathers: so shalt thou find in the book of the records, and know that this city is a rebellious city, and hurtful unto kings and provinces, and that they have moved sedition within the same of old time: for which cause was this city destroyed. (Ezra 4:15)). The “book of the records” was doubtless a collection of stone or clay tablets. In some cases these have been found in such numbers as to form quite a library.
The word BOOK is used symbolically for what a book might contain, as prophecy or predictions. Ezekiel and John were told to eat the books presented to them (Ezek. 2:8-98But thou, son of man, hear what I say unto thee; Be not thou rebellious like that rebellious house: open thy mouth, and eat that I give thee. 9And when I looked, behold, an hand was sent unto me; and, lo, a roll of a book was therein; (Ezekiel 2:8‑9); Ezek. 3:1-31Moreover he said unto me, Son of man, eat that thou findest; eat this roll, and go speak unto the house of Israel. 2So I opened my mouth, and he caused me to eat that roll. 3And he said unto me, Son of man, cause thy belly to eat, and fill thy bowels with this roll that I give thee. Then did I eat it; and it was in my mouth as honey for sweetness. (Ezekiel 3:1‑3); Rev. 10:99And I went unto the angel, and said unto him, Give me the little book. And he said unto me, Take it, and eat it up; and it shall make thy belly bitter, but it shall be in thy mouth sweet as honey. (Revelation 10:9): Compare Jer. 15:1616Thy words were found, and I did eat them; and thy word was unto me the joy and rejoicing of mine heart: for I am called by thy name, O Lord God of hosts. (Jeremiah 15:16)). It is also symbolical of the records that are with man usually written in a book (Psa. 56:88Thou tellest my wanderings: put thou my tears into thy bottle: are they not in thy book? (Psalm 56:8); Dan. 7:1010A fiery stream issued and came forth from before him: thousand thousands ministered unto him, and ten thousand times ten thousand stood before him: the judgment was set, and the books were opened. (Daniel 7:10); Mal. 3:1616Then they that feared the Lord spake often one to another: and the Lord hearkened, and heard it, and a book of remembrance was written before him for them that feared the Lord, and that thought upon his name. (Malachi 3:16); Rev. 20:1212And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works. (Revelation 20:12)).
Various books are mentioned in scripture which are not now in existence.
1. The wars of the Lord (Num. 21:1414Wherefore it is said in the book of the wars of the Lord, What he did in the Red sea, and in the brooks of Arnon, (Numbers 21:14)). The quotation is poetry, so that the book may have been a collection of odes by Moses on the wars of Jehovah.
7. Book of Jehu (2 Chron. 20:3434Now the rest of the acts of Jehoshaphat, first and last, behold, they are written in the book of Jehu the son of Hanani, who is mentioned in the book of the kings of Israel. (2 Chronicles 20:34)). These various references show that when the historical parts of the Old Testament were written, further information respecting the kingdom was obtainable from the books referred to, if such had been needed; but which was not required for the inspired volume of God.

“Letter, The” From Concise Bible Dictionary:

Strong’s Dictionary of Hebrew Words:

Number:
5612 (find all occurrences in KJV Bible)
Transliteration:
cepher
Phonic:
say’-fer
Meaning:
or (feminine) ciphrah (Psa. 56:8 (9)) {sif-raw'}; from 5608; properly, writing (the art or a document); by implication, a book
KJV Usage:
bill, book, evidence, X learn(-ed) (-ing), letter, register, scroll