Author: Hermann Hesse
Released: 1922
Guaranteed to improve: Your journey (even if you don't know where the hell you're going).

First he is an ascetic, then he spends times in the arms of a courtesan, then he becomes a successful businessman, then he is a father. None of these roles ease the restless heart of Siddhartha. No possessions bring him peace. No one thing can bring him fulfillment. Siddhartha ultimately finds the tranquility he had sought in the place he least expected to find it. While many books provide a path to self-improvement or solutions to life's problems, perhaps the most instructive books are those like Siddhartha, which remind us that there is no clear path.