One Fearful Yellow Eye

Travis McGee, John D. MacDonald's boat-dwelling PI, had his 8th book in '66. Sort of a combination of Mike Hammer, Phillip Marlowe and James Bond, the character's book titles were known for always featuring colors, thus presaging all the later fictional detectives whose titles featured numbers, letters, cats, etc.

There would be years and years of equally successful McGee appearances but '66 was most definitely an early peak!