Introduction: The Kaluza-Klein Miracle.

1. The Power of Geometry.

2. Visions of Hyperspace.

3. The Physicist’s Stone: Uniting Electricity, Magnetism, and Light.

4. Getting Gravity in Shape.

5. Striking the Fifth Chord: Kaluza’s Remarkable Discovery.

6. Klein’s Quantum Odyssey.

7. Einstein’s Dilemma.

8. Truth under Exile: Theorizing at Princeton.

9. Brave New World: Seeking Unity in an Age of Conflict.

10. Gauging the Weak and the Strong.

11. Hyperspace Packages Tied Up in Strings.

12. Brane Worlds and Parallel Universes.

Conclusion: Extra-dimensional Perception.

Notes.

Further Reading.

Index.