For anyone even mildly interested in crime, exploitation, vigilantes and other human stories across the oceans, check out The Outlaw Ocean by NYT journalist Ian Urbina. Brilliant work.
https://www.goodreads.com/book/show/43345615-the-outlaw-ocea...
https://www.goodreads.com/book/show/43345615-the-outlaw-ocea...
Yeah it puts into perspective how daunting the tasks of cleaning up the oceans (pollution, crime, illegal fishery, drilling, etc.) really are.