Intensional logics have their origin and use in research areas ranging from linguistics, cognitive science and artificial intelligence, to philosophy and computer science. This volume presents an up-to-date account of current trends in intensional logic. Consisting of nine original research papers preceded by a survey of recent developments, the book highlights recent advances in a number of interdisciplinary areas, including traditional philosophical concerns about correct descriptions and abstract objects; the use of intensional languages as descriptive tools for finite graphs; proof-theoretical considerations; general strategies of 'modalizing' calculi usually perceived to be non-modal; and mathematical foundations of intensional logics. The book is aimed at graduate students and researchers in pure and applied logic.