Saul Bellows Herzog is part confessional, part exorcism, and a wholly unique achievement in postmodern fiction.

Is Moses Herzog losing his mind? His formidable wife Madeleine has left him for his best friend, and Herzog is left alone with his whirling thoughts - yet he still sees himself as a survivor, raging against private disasters and the myriad catastrophes of the modern age. In a crumbling house which he shares with rats, his head buzzing with ideas, he writes frantic, unsent letters to friends and enemies, colleagues and famous people, the living and the dead, revealing the spectacular workings of his labyrinthine mind and the innermost secrets of his troubled heart.

This Penguin Modern Classics edition includes an introduction by Malcolm Bradbury

Spectacular ... surely Bellows greatest novel. 
Malcolm Bradbury

A masterpiece ... Herzogs voice, for all its wildness and strangeness and foolishness, is the voice of a civilization, our civilization
The New York Times Book Review