The 2nd edition of the book “3D User Interfaces: Theory and Practice,” is now available! The first edition, which came out more than 11 years ago, has long been a reference guide and resource for students, researchers, and practitioners in our field, but with the recent surge in interest in VR, AR, and 3D UIs there was a need to produce an updated version. The second edition has been re-built from the ground up, with tons of new content, improved organization, more recent references, and much more. Notable additions include two chapters on human factors and HCI fundamentals, and two running case studies that discuss the design of a VR game and a mobile AR application in light of the concepts in each chapter. Joe LaViola is the lead author for this edition, and Ryan McMahan also joined the team as an important co-author. For more information about the book and an opportunity to order, please visit the publisher’s website.