Expect the unexpected (or you won't find it) - Roger Von Oech

Heraclitus was famous for his provocative sayings. For example: 'You can't step in the same river twice." "Dogs bark at what they don't understand." "Expect the unexpected, or you won't find it, because it leaves no trail."
Today, more than 2,500 years after they were written, his ideas about life, nature and the cosmos remain as startlingly original as ever. In EXPECT THE UNEXPECTED, Roger von Oech uses thirty of Heraclitus's epigrams as a springboard to innovation. Treating each saying as a creativity exercise, he supplies mental puzzles, amusing anecdotes, and intriguing questions designed to topple old habits of thought and fire the imagination.
Anyone, from corporate executives to students to artists, looking for a new approach to problem-solving will find this a wise and invaluable tool. It can be read from start to finish as a creativity workbook, treating each insight as a daily meditation, or it can be consulted as an oracle.