ISBN-13: 9783030044138, 978-3030044138. Graph Drawing and Network Visualization 26th International Symposium, GD 2018, Barcelona, Spain, September 26-28, 2018, Proceedings. This book constitutes the refereed proceedings of the 26th International Symposium on Graph Drawing and Network Visualization, GD 2018, held in Barcelona, Spain, in September 2018.