"Don't limit your challenges; challenge your limits. Each day we must strive for constant and never ending improvement."

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The detective story itself is in a dilemma. It is a vein which is in danger of being worked out, the demand is constant, the powers of supply variable, and the reader, with each one he absorbs, grows a little more sophisticated and harder to please, while the novelist, after each one he writes, becomes a little more exhausted.

— Cyril Connolly