Books about thinkers require a kind of unity that their thought may not possess. This cautionary statement is especially applicable to Mikhail Bakhtin, whose intellectual development displays a diversity of insights that cannot be easily integrated or accurately described in terms of a single overriding concern. Indeed, in a career spanning some sixty years, he experienced both dramatic and gradual changes in his thinking, returned to abandoned insights that he then developed in unexpected ways, and worked through new ideas only loosely related to his earlier concerns Small wonder, then, that...