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 the most productive and well known working memory researchers worldwide. Chapters cover different approaches to understanding how working memory works, using behavioural experimental techniques, neuroimaging, computational modelling, how it changes from childhood through to healthy old age, how it is affected by dementia and brain damage, and how it is used in everyday life. 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. Uniquely, all authors consider evidence that is not consistent with their theoretical assumptions, whereas it is common for authors to ignore contradictory evidence. This approach leads to new interpretations and new hypotheses to test in future research and greatly enhances our understanding of this crucial human ability. Written and edited by the leading researchers in the field, the book will be an important and influential addition to the memory literature.