"Written by two renowned experts in the field, the books under review
contain a thorough and insightful treatment of the fundamental
underpinnings of various aspects of stochastic processes as well as a
wide range of applications. Providing clear exposition, deep
mathematical results, and superb technical representation, they are
masterpieces of the subject of stochastic analysis and nonlinear
filtering....These books...will become classics." --SIAM REVIEW