First published Open Access under a Creative Commons license as What is Diary Method?, this title is now also available as part of the Bloomsbury Research Methods series. This book provides an up-to-date, concise, and engaging introduction to solicited diary method, aimed at researchers and students who want to employ this methodology in their projects. Its primary focus is on the use of solicited diary method in the context of social and health-related research, but it also offers useful guidance on the everyday practice of diary-keeping. The authors draw on published research that makes use of this method, including their own independent studies involving older adults and family carers. The book opens with an overview of the development of diary techniques and a discussion of the value of the method, and provides an overview of the different ways of collecting and using diary data and techniques for analysing it. Key ethical issues are sensitively discussed. The book engages with new and novel developments in solicited diary method by engaging with the use of technology including discussion of how digital devices, email exchanges, social media such as Facebook, weblogs and micro-blogging such as Twitter, have the potential to change the meaning and nature of diary-keeping. The book includes a variety of visuals to enhance understanding, including a tabulated summary of the main strengths and limitations of using diary method, and strategies for mitigating limitations.