The Late George Apley

From back cover of Washington Square Press paperback January 1970:

A wicked satire

This is a brilliantly etched portrait of a Bostonian and of the tradition-bound, gilded society in which he lived. But even more, it is the story of three generations of Apley men, a story of the maturing of America, a story of the golden era of American security from 1866 to 1933.

The Late George Apley is fascinating, warm, witty and delightful. Marquand's superb sense of the comix has made it a classic of modern American literature. And when at last you reluctantly put it down, you will know why it won a Pulitzer Prize.

Introduction by Henry H. Adams

Synopsis from Open Library.