We are delighted to bring you this volume of the best agile articles of 2020. Our goal in publishing this book is to cull through the many articles that are published every year to bring you a curated set of high-quality articles that capture the latest knowledge and experience of the agile community in one compact volume. Our purpose is twofold. First, we understand that it can be hard to figure out where to go when looking for ideas and answers. There are thousands of blogs, videos, books, and other resources available at the click of a mouse. But that can be a lot to sort through. So, we thought we could be of some assistance. Second, we wanted to bring some visibility to many people who are doing good work in this field and are providing helpful resources. Our hope is that this publication will help them connect to you, the ones they are writing for. Our intention is that this publication is to be by the agile community as a service to the agile community and for the agile community. With that in mind, we pulled together a great group of volunteers to help get this work into your hands. The articles in this volume were selected by: - A diverse Review Committee of twenty-four people with expertise in a variety of areas related to agile.- The agile community. A call for nominations went out in early 2020 and over 120 articles were nominated by the community. We selected the top 50 articles to present in the publication.The articles themselves cover a wide variety of topics, including organizational structure, culture, and agile leadership. There is something for almost everyone here. This is the fourth book in the series. Previous books, Best Agile Articles of 2017, 2018, and 2019, are available on Amazon and on the website at https: //baa.tco.ac/books.We are thankful for the great participation of the agile community at large and to our sponsor, Scrum.org.