Lots on personalities and drama.<p>Is mostly about 1890 to about 1910 and then stops.<p>Really slow finally driving a stake through the heart of the quasi-mystical quaternions and killing them off.<p>No mention of the Gauss, Green, and Stokes theorems, exterior algebra, what is now called Grassman algebra, manifolds, differential geometry, orthogonal polynomials, Fourier theory, linear transformations, etc.<p>No mention of connections with systems of linear equations, linear transformations, or functional analysis such as Hilbert space.<p>There is serious question if the author really understands the subject. It looks like he got sucked down into quaternions and never really got out.