Tropical Cyclones: Observations and Basic Processes provides a modern observational overview of tropical cyclone structure and behavior. The book is organized into two sections. Part I builds a new foundation for a basic understanding of tropical cyclone genesis, intensification, and weakening. Part II employs the basic elements developed in Chapters 2--10 to present new appraisals of the accepted WISHE paradigm of vortex intensification, storm energetics, requirements for a quasi-steady state hurricane, and more likely transient lifecycle behavior in a consistent three-dimensional flow configuration. Tropical Cyclones provides a state-of-the-art summary of the fundamentals of cyclones accessible to advanced undergraduates, graduate students, and hurricane forecasters. Tropical cyclones are one of the biggest threats to life and property even in the formative stages of their development. They include a number of different hazards that can individually cause significant impacts on life and property, such as storm surge, flooding, extreme winds, tornadoes, and lighting. Members of the Royal Meteorological Society are eligible for a 35% discount on all Developments in Weather and Climate Science series titles. See the RMetS member dashboard for the discount code.