Radiationless transitions comprise an important class of physical phenomena occurring in the excited states of molecules. They affect the lifetimes of the ex- cited states and govern primary photochemical and photophysical processes. Much effort has been devoted to the understanding of radiationless transi- tions. Still, owing to recent advances, the field continues to attract attention. The demand for a book on the theory of these processes naturally arises in at- tempting to comprehend a large body of literature, as the famous review article by K. F. Freed and the book by R. Englman do not...