Working memory refers to how we keep track of what we are doing moment to moment throughout our waking lives. It allows us to remember what we have just done, focus on what we are doing now, to solve problems, be creative, think about what we will be doing in the next few seconds, and continually to update in our mind changes around us throughout the day. This book brings together in one volume, state-of-the-science chapters written by some of the most productive and well-known working memory researchers worldwide. Chapters cover leading-edge research on working memory, using behavioural experimental techniques, neuroimaging, computational modelling, development across the healthy human lifespan, and studies of neurodegenerative disease and focal brain damage. A unique feature of the book is that each chapter starts with answers to a set of common questions for all authors. This allows readers very rapidly to compare key differences in theoretical assumptions and approaches to working memory across chapters, and to understand the theoretical context before going on to read each chapter in detail. All authors also have been asked to consider evidence that is not consistent with their theoretical assumptions. It is very common for authors to ignore contradictory evidence. This approach has led to new interpretations and new hypotheses for future research to greatly enhance our understanding of this crucial human ability.