Stephen Hunter’s G-MAN will be on sale May 16, 2017. (Published by Penguin Random House)

Isn’t much. Not a thing, really. Just a boulder stuck horizontally in a patch of grass that extends, like a peninsula, into a parking lot fronting a bland municipal building. If you look carefully, you’ll notice a brass plaque on the boulder, with brass names and then brass words in the stentorian “official” prose of commemoration that seems hollow so many decades after.

This unprepossessing arrangement, under a vault of trees in a far suburb of Chicago called Barrington, offers little to please the eye or appease the heart. Few journey to see it. I am one who did.