I posted some comments re. this book some weeks or months ago on a different thread, but it might be worth mentioning here as well.
A fine book of sea songs is "Songs of the Sea: The Tales and Tunes of Sailors and Sailing Ships," by Stan Hugill, published by McGraw-Hill Book Co., UK, 1977. It's a fine resource for anyone interested in this genre of folk songs. It's hardbound, 8"X10" and when I bought it [some years ago] sold for $17.50. Probably double that by now. Words, melody score, history and background of over 100 sea songs from a half-dozen countries, plus several pages of background information on "the age of sail" including the types of ships and types of songs, along with a great many illustrations and drawings.