Another classic for any armchair sailor would be THE MUSIC OF THE WATERS: a Collection of the Sailors Chanties, or Working Songs of the Sea, of All Maritime Nations, by Laura A. Smith, Kegan Paul, Trench & Co., London, UK, © 1888.

My copy cost $50 but it's well worth the price as the earliest comprehensive study of traditional sea songs.

Cheerily,
Charley Noble