This volume offers the reader practical methods to compute the option prices in the incomplete asset markets. The GLP & MEMM] pricing models are clearly introduced, and the properties of these models are discussed in great detail. It is shown that the geometric Lévy process (GLP) is a typical example of the incomplete market, and that the MEMM (minimal entropy martingale measure) is an extremely powerful pricing measure.This volume also presents the calibration procedure of the GLP \& MEMM] model that has been widely used in the application of practical problems.