Dunno why this interests me so. Probably because Caroline Alexander wrote The Endurance, which is a terrific adventure and achievement as well as an enticing book. She uses as many first-person accounts as exist, which means none from Fletcher Christian, whose fate is unknown. So far he's mutinied without noticeable provocation.
I did just watch a 1984 movie about the mutiny with Anthony Hopkins as Bligh and Mel Gibson (who, to my surprise, was handsome once) as Fletcher Christian and the ever-luscious Daniel Day-Lewis as John Fryer (second in command) and Liam Neeson for good measure. It could have escaped being marked as an '80s flick if Vangelis hadn't done the soundtrack. The movie paints Bligh as self-serving and ineffectual and Christian as torn away from his Tahitian love. Whatever.
I expect once the book reaches the courts martial, better motivations will be revealed or surmised. So far it's quite good.