Edward John Barrington Douglas-Scott-Montagu, 3rd Baron Montagu of Beaulieu, was an English Conservative politician well known in Great Britain for founding the National Motor Museum, as well as for a pivotal cause célèbre in British gay history following his 1954 conviction and imprisonment for homosexual sex, a charge he denied. https://en.wikipedia.org/wiki/Edward_...
The author explains in his opener that this isn't so much about the cars, per say, but the drivers.
The book dives into car culture - the clothes, the specialty modifications, the rankings, the races, etc. - of the early days of automobiles, showing how it sprang up almost the moment the first car hit the road.