Jonathan Relevant is ... an unknown.
Taking a break from having written at least ten Man from O.R.G.Y. and three Girl from Pussycat adventures, Ted Mark created a new hero to titillate the readers of the early 70's. This new character was the perfect man. He was what 'every man sees' as a hero and every woman sees as 'her lustful dream'. Naturally, Mark would have everyone fighting over his body.
The character appears suddenly in the frozen land of the Arctic immediately after a nuclear blast. He is dazed and cannot remember who he is, although he quickly picks the name of Jonathan Relevant as sounding right. The craziest thing about him, besides his perfect physical presence, is the fact that as he speaks, everyone hearing him does so in that individual's own language.
Some believe him to be an alien from space while at least one credible source provides proof of his being raised by a scientist couple to be every bit as perfect as he seems to be. The name of their secret lab is said to have been 'Charisma', hence the moniker given him as the Man from there.
Whichever origin is the true one, every nation wants him and the things he has to do to remain his own man make up a good deal of the three-book series. Agents abound in these adventures as does the standard Ted Mark lust for, well, lust.
If he is an alien, he has a natural talent at love-making. If he is a prodigy, he is a well-trained one. He is also very, very good at staying alive and out of the hands of those who hunt him.