This is not your average how-to-sail manual. In The Blue Book of Sailing, Adam Cort (SAIL’s Senior Editor) divides sailing into “The 22 keys to sailing mastery.” The topics are basic but presented an in-depth manner that will provide even lifetime sailors with a deeper understanding. For instance, rather than simply describing the process of a tack, Cort delves into the evolution of tacking itself, explaining how double-ended Melanesian proas of old had to tack through 120 degrees. By breaking down the sport into 22 principles and then illustrating them with history, physics and personal stories, Cort has created a uniquely helpful volume.