What to read after Optimism?

Stuck in a rut? Need an attitude adjustment? This inspirational classic from American author Helen Keller is bound to fit the bill. Rendered deaf and blind by scarlet fever in her infancy in a time when the disabled were often shunned and ignored, Keller managed to learn to read, write, and speak, not in only in her native English, but in several other languages, as well. Keller regards optimism as "the faith that leads to achievement," and this treatise lays out her views on making the best of even the direst of circumstances.