What does an unsuccessful draft of a fine author's work look like? If that question interests you, read Summer Crossing. If the question doesn't, you can skip this novel.
I doubt if this book would have been published except that the story contains bits and pieces of themes that are powerfully developed in Breakfast at Tiffany's, also by Mr. Capote.
When Truman Capote found his writing voice, it was in writing about his own life and the people he knew.
Summer Crossing comes across, by comparison, as a writing exercise disconnected from his personal experience that has serious problems in its conception and implementation.
So what's the story?
A rich young New York socialite, Grady McNeil, is left inexplicably behind and unchaperoned for the summer while her parents shop their way through Europe. In the best tradition of young people first on their own, Grady soon finds a way to break all the bounds of her former life. She craves the reality of this new life . . . but finds it brings complications she hadn't really expected.
With that set up, one would expect a fine short story . . . but Mr. Capote didn't yet have the skill to turn the premise into a novel. Later, he would.
Should the book have been salvaged and made available? I think so.
Should you read it? Probably not.