It's a good book but no book on Vectors should cost that much to learn. Are you hearing W. W. Norton and Co? I wish the author would move to Dover and price this so students can afford it. Since when did learning mathematics become a capitalist ideal of profit? That said, I wish that all that could have also included Tensors. It's a natural extension of Vectors and does belong in the set containing 'And all that!' It could have made some attempt to add an additional chapter on the equations that use differential operators such as Schrodinger, Maxwell, Continuity equation and Fluid flow. What about generalized spaces? At least if it's the 4th edition, it could have added a chapter or two for all the price gouging.