Harry - a search on "matthew brum author sea shanties" gives lots of references to sea shanties (strangely enough!), & one reference to a Matthew Brum who is on facebook, you could check him out if you are on facebook.

I go to 2 shanty sessions, one weekly & one monthly, but can't help you with which book is best as I didn't even know how many books he published until I found this list on Wikipedia.

The Bosun's Locker, Collected Articles 1962-1973 (Heron Publishing, 2006)
Shanties from the Seven Seas (1961; abridged edition 1984)
Sailortown (1967)
Shanties and Sailor Songs (1969)
Sea Shanties (1977)
Songs of the Sea (1977)

As the world turns & other Catters come on line, someone will know.

sandra