Not a book, and not a "conspiracy" theory, but there is an audacious theory that Bach's wife wrote the suites for unaccompanied cello. Shakespeare authorship i

Not a book, and not a "conspiracy" theory, but there is an audacious theory that Bach's wife wrote the suites for unaccompanied cello. Shakespeare authorship is a bit of a special case as there is a peculiar lack of evidence, as opposed to a mass of evidence that has to be explained away with a "conspiracy", or an expected lack of evidence, as in the case of Bach: most of his works were neither published during his life nor found in a manuscript with his handwriting.