Ferroelectricity is one of the most studied phenomena in the scientific community because of the vitality of ferroelectric materials in a broad spectrum of applications comprising of high dielectric constant capacitors, pyroelectric devices and transducers for medical diagnostic, piezoelectric sonars, electro-optic light valves, electromechanical transducers and ferroelectric random access memories. Ferroelectricity at nanoscale draws huge attention to the advancement of novel technologies. The need for ferroelectric systems with particular applications led to detailed research along with the betterment of processing and characterization techniques. This book provides an updated outlook of current research into ferroelectricity, covering several formulations, their forms (bulk, thin films, and ferroelectric liquid crystals), and ferroelectricity at nanoscale.