The digital infrastructure of media production, dissemination and consumption is becoming increasingly complex, presenting the challenge of how we should research the digital journalism environment. Digital journalism takes many forms – we therefore need to revise, improve, adjust and even invent methods to understand emerging forms of journalism. In this book, scholars at the forefront of methodological innovations in digital journalism research share their insights on how to collect, process and analyse the diverse expressions of digital journalism, including online news, search results, hyperlinks and social media posts. As digital journalism content often comes in the form of big data, many of these new approaches depart from the traditional methods used in media research in significant ways. As we move towards new ways of understanding digital journalism, the methods developed for such purposes also need to be grounded in scientific rigour. This book aims to share some of the emerging processes by which these methods, tools and approaches are designed, implemented and validated. As such, this book not only constitutes a benchmark for thinking about research methods in digital journalism, it also provides an entry point for graduate students and seasoned scholars aiming to do research on digital journalism. This book was originally published as a special issue of Digital Journalism.