I'm moderately sure I sort-of remember the cover; a typical lots-of-tanned-and-sweaty-muscles type, wearing a maybe-red loincloth and one of the common helmet types with a broad brim, crest, and mesh mask covering the whole face. Holding something that looked not entirely unlike an actual gladius, and striking a dramatic pose. Publishing date could be 30-40 years ago, plus-or-minus.

I usually remember books I've read all the way through better than that, but this one just wasn't all that memorable. I don't even remember how it ended after he (inevitably) escaped from the medical lab where he was revived. A single glass might not be enough, you might need the whole bottle so you can forget it as well. ;)

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