Britt St. Vincent is an agent with Mero.
"To the public, Britt St. Vincent is a great Grand Prix racing driver. To the Pentagon, Britt is a dangerous renegade scientist who quit their frighteningly effective mind-control research project. To a vast secret organization known as Mero, Britt is a vital agent in a global struggle against the dark occult forces menacing humanity."
So reads the backs of the books in this action series. St. Vincent's first encounter with the Mero Institute was a fun one - driving in the desert of California in his Ferrari, he notices a pair of headlights gaining on him. Being a racer and having an awesome car in which he is speeding, he knows that was impossible. He soon learns more impossible things and his life is never the same again as he is recruited into Mero and taught to use the gifts he'd always had in defense of a needy world.
Mero is a civilian agency made up largely of former military researchers who had grown increasingly worried about the expanding use of psychic abilities to threaten democratic ways of life. Its interest in St. Vincent dates back to his military days when he was tested by the Army and found to possess impressive though latent abilities. That relationship did not end well when he and a young woman he met while she was also being tested tried to sneak away to get married - she died and he swore off the government.
St. Vincent loves adventure, shown by his chosen profession as a race car driver, and he gets a ton of it with Mero. He also loves the ladies and he gets to know a lot of them, both good ones and a few bad ones. He also finds that he just seems to get better and better and, while his ego grows to be a bit much, the excitement and the dangers grow right along with it.
Along with his ego growing, so grows the strangeness of the cases as the subjects fall full-force into the realm of science fiction. ESP, telepathy, mind-control, and all other facets of the paranormal come into play in one manner or another. St. Vincent finds he not only has to be one step ahead of the bad guys, he has to be one thought ahead of them as well.