Preface.- intuitive theory of sliding mode control.- Conventional Sliding Modes.- Conventional Sliding Mode Observers.- Second order sliding mode controllers and differentiators.- Analysis of sliding mode controllers in the frequency domain.- Higher order sliding mode controllers and differentiators.- Observation and Identification via HOSM-Observers.- Disturbance Observer Based Aerospace Applications.- A Mathematical Preliminaries.- B Describing Functions.- C Linear Systems Theory.- D Lyapunov Stability.- Bibliography.