The Complete Book of Roller Skating was published in 1979, before the fall of disco skating and the rise of inline skating. Still, this book is an excellent resource for anyone interested in quad roller skating. It covers skating's history in detail, with lots of great photographs, and devotes chapters to artistic, hockey, speed, disco, and outdoor skating.
Unlike most other skating reference books, this one talks about the competitive skating world (at least, as it was in 1979), not just about recreational skating. We see (in words and photos) skaters training for competition at Nationals and Worlds, performing such difficult moves as "the impossible sit spin," a pairs spin that requires amazing strength from both skaters.