Explanation

You are told that the biography is gripping, but not appropriate for young people. So, it’s exciting — and probably full of sex, violence, or both.

No-holds-barred and storied are the only choices that could even remotely match — surely the biography isn’t pretending to be naive (faux-naif) or unwilling to change (dyed-in-the-wool), and the “life” isn’t immature (callow) or stalled (stonewalled).

No-holds-barred, storied.
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