Book vs text

Book and text both are nouns.

Word	Noun	Adjective	Verb	Adverb
Book	Yes	No	No	No
text	Yes	No	Yes	No

Book (noun)	text (noun)
the sacred writings of the Christian religions	the words of something written
the sacred writings of Islam revealed by God to the prophet Muhammad during his life at Mecca and Medina	the main body of a written work (as distinct from illustrations or footnotes etc.)
	a book prepared for use in schools or colleges
	a passage from the Bible that is used as the subject of a sermon

Book (verb)	text (verb)
	to send a message by SMS or similar text-based messaging service