Designing Social Interfaces: Onboarding
They say you don't get a second chance to make a first impression, and on the Web it's truer than ever. If you don't capture the attention of new visitors from the moment they arrive and guide them on their initial journey through the site, they won't learn that the benefit you provide outweighs the cost—their time and effort to participate—and as a result, won't stick around very long. Worse, they'll tell their friends not to bother visiting, either. —UX Magazine
Ordering this book today and excited to read it.