Involuntary memory was identified by the pioneering memory researcher Hermann Ebbinghaus more than a century ago, but it was not until very recently that cognitive psychologists began to study this memory phenomenon. This book is the first to examine key topics and cutting-edge research in involuntary memory. Discusses topics such as involuntary memories in everyday life, across the life-span, and in the laboratory; the special ways in which involuntary memories sometimes manifest themselves and a number of theoretical treatments of the topic. Presents innovative research that not only represents the starting point of the study of involuntary memory, but also places it in such broader topics as autobiographical memory, consciousness and memory, aging and memory, implicit and explicit memory, depression, and psychosis.