Grant, Douglas
Mark Twain
Grove Press, 1962
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Neider, Charles, editor
The Autobigraphy of Mark Twain
NY. Harper & Brothers
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Mark Twain letters to mary
edited with a commerntary by Lewis G. Leary
Columbia University Press, 1961
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Smith, Henry Nash
Mark Twain: the development of a writer
Belknap Press of Harvard University Press, 1967
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Twain, Mark, 1835-1910
Mark Twain in Australia and New Zealand
Penguin Books, 1973
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