The Merriam-Webster Encyclopedia of Literature writes:
Volume containing two interrelated stories by J.D. Salinger, published in book form in 1961. The stories, originally published in The New Yorker magazine, concern Franny and Zooey Glass, two members of the family that was the subject of most of Salinger's short fiction. Franny is an intellectually precocious late adolescent who tries to attain spiritual purification by obsessively reiterating the "Jesus prayer" as an antidote to the perceived superficiality and corruptness of life. She subsequently suffers a nervous breakdown. In the second story, her next older brother, Zooey, attempts to heal Franny by pointing out that her constant repetition of the "Jesus prayer" is as self-involved and egotistical as the egotism against which she rails.
I have not read anything else by Salinger but I found this at a thrift store for 99 cents and got it because I've been trying to read more classics in the past couple years. After the first section, I didn't care for the book. It was very dense and didn't have a story to it.
I read Raise High the Roof Beam Carpenters and Seymour last year, and I knew I had to read Franny and Zooey. I LOVE the Glass family, and this book definitely did not disappoint my high expectations. The way J.D. Salinger is able to make his characters feel real and organic is amazing; I love the stream of consciousness narrative and the character driven "plot". I've never seen anyone else write like this. In fact, it makes me want to write. I'm completely inspired and completely in love; yes, Franny and Zooey is going on my favorites list.