I've read the London book, years ago. Some of the biographies of London are fascinating, "A Sailor on Horseback" comes to mind.
The Snark expedition was a disaster, almost from beginning to end. London was a great dreamer, and accomplished a tremendous amount in a short life, but he was not the luckiest fellow. Snark was way over budget, plagued by poor workmanship and strikes, fell off the ways half way through construction because of the 1906 SF earthquake, and the tale of woe goes on and on. If I remember, London puts a much glossier facade on the adventure, so in addition to his book, seek out some of the other biographical material.
Some speculate the voyage greatly shortened London's life. He contracted yaws, a tropical illness similar to syphllis, and spent much of his remaining years trying all kinds of cures, including mercury and arsenic compounds. Like syphllis, yaws eventually affects the mind, and London, always a self-styled lone wolf, began doing things toward the end like eating raw poultry. Most biographers believe he took his own life with morphine.
London's life is easily as interesting as any of his books.
So many questions, so little time.