Chapter 1. Introduction and Short Previews of Coming Chapters.- Chapter 2. Series-Parallel Circuit Topologies of Single Sensors.- Chapter 3. Series-Parallel Circuit Topologies of Humbucking Pickups.- Chapter 4. Series-Parallel Circuit Topologies of Matched Single-Coil Pickups.- Chapter 5. The Limits of Mechanical Switches.- Chapter 6. An Efficient uC-controlled Cross-Point Pickup Switching System.- Chapter 7. The Tonal Advantages of Pickups with Reversible Magnets.- Chapter 8. Common Connection Point Humbucking Circuits with Odd and Even Numbers of Matched Single-Coil Pickups.- Chapter 9. A Common-Point Connection Experiment With Two Mini-Humbuckers.- Chapter 10. Switching Systems for Common-Point Connection Pickup Circuits.- Chapter 11. Humbucking Basis Vectors - Tones Without Switching.