text vs Book

text and Book both are nouns.

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

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

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