In general, it is called text, but more specifically, depending on the type of book, there are many written elements:
There are also specific text elements in the body of the work, like subtitles, headers, footers, footnotes, citations, etc.
Elements
Elements
The book was written originally about geometry but mostly had theories and proofs
Elements
about 300 BC
about 300 BC
Written in 300 B.C. Its significance is the connecting of theorums.
Elements
The Elements What You Really Want to Know was written by Ron Miller
The book "The Elements" was written by the mathematician Euclid. He was known as the father of geometry.
C.E Fessenden has written: 'Elements of physics' -- subject(s): Accessible book, Physics
Dennis M'Curdy has written: 'Euclid's elements' -- subject(s): Accessible book, Geometry