[editor-surveyor]

Deut 4:2, and 12:32

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Deu 4:2 Ye shall not add unto the word which I command you, neither shall ye diminish [ought] from it, that ye may keep the commandments of the LORD your God which I command you.

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Deu 12:32 What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.

[Cronos]

That is specifically about Deuteronomy that one should not add to the book of Deuteronomy, not a word about adding or removing books to the Bible

The wording in Apocalypse clearly says And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from these things that are written in this book

"the book of this prophecy" -- the verses in Apocalypse are referring to the book of Apocalypse only.

The Bible is a collection of books, not "a" (singular) book