Here's a short story:

Muslims believe the Quran was verbally revealed by God to Muhammad through the angel Gabriel (Jibril), gradually over a period of approximately 23 years, beginning on 22 December 609 CE, when Muhammad was 40, and concluding in 632, the year of his death. Muslims regard the Quran as the most important miracle of Muhammad, a proof of his prophethood, and the culmination of a series of divine messages that started with the messages revealed to Adam and ended with Muhammad. The word "Quran" occurs some 70 times in the text of the Quran, although different names and words are also said to be references to the Quran. 

According to the traditional narrative, several companions of Muhammad served as scribes and were responsible for writing down the revelations. Shortly after Muhammad's death, the Quran was compiled by his companions who wrote down and memorized parts of it. These codices had differences that motivated the Caliph Uthman to establish a standard version now known as Uthman's codex, which is generally considered the archetype of the Quran known today. There are, however, variant readings, with mostly minor differences in meaning. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What is the name of the book?
Guess: the Quran

Question: How long did it take to complete?
Guess: approximately 23 years

Question: Who transcribed it?
Guess: several companions of Muhammad

Question: Who gave the message?
Guess: Muhammad

Question: Who spoke to him?
Guess: God

Question: Through whom?
Guess: the angel Gabriel (Jibril)

Question: When did Muhammad die?
Guess: 632

Question: About how old was he?
Guess: 63

Question: Who established a correct type of the book?
Guess: Caliph Uthman

Now answer the following question in the same format.

Question: What is the book regarded as?

Uthman's codex