en_tn_condensed/ecc/12/12.md

be warned about something more

Possible meanings are 1) these words refer to what follows or 2) these words refer to the material in verse 11, "be careful of anything in addition to that."

The making of many books has no end

The noun phrase "the making" can be stated as a verb. Alternate translation: "People will never stop making many books"

brings weariness to the body

Here "body" represents the whole person. Alternate translation: "makes the person tired" (See: rc://en/ta/man/jit/figs-synecdoche)