The Mexico Run was a paperback original published by Fawcett Gold Medal in 1974, which is the very edition that caught my eye. The cover features a racing car—Jaguar, it appears—with a starred bullet hole in the windshield, billowing dust in its wake, a stone church in the background, and another car in pursuit. It is beautifully 1970’s Gold Medal. The artist: Unknown (to me).
The opening sentence: