Abstract : This report constitutes the principal of a book on combustion stability in solid propellant rockets. The present report contains nine chapters that are each substantially complete except for some editorial, bibliographical and art work in some chapters. Chapters 1 thru 9 include: Introduction to Combustion Instability; Combustion Chamber Processes; Guidance in Missile System and Motor Design; Fundamentals of Propellant Combustion; Analytical Modeling of Combustor Flow; Modeling of Combustion Dynamics; Bulk Mode Oscillations and L* Instability; and Combustor Stability Analysis.