An advanced handbook for Crystal Radio intended for the serious beginner to the veteran user. This book contains project ideas and notes interspersed with technical discussions on the theoretical basis for different aspects of the radio hobby. Discussions introduce mathematical formulas and spreadsheet models to illustrate concepts from antenna/ground, resonance, diode (solid state and vacuum), capacitance, coil Q, and audio impedance matching. Basically a technical look at crystal radio from the antenna to your ear. Also included is a small catalog of crystal hookups and a fun discourse on detecting solar flares with shortwave radio.