The Amazon Kindle versions of lots of science books are terrible. This is because the super-sucky software cannot handle equations or figures appropriately. It's like postscript was never invented. Equations are frequently reduced to tiny images - pictures of equations rather than actual equations. Inline equations fare even worse - exponents are lost, Greek letters become inequivalent Roman ones, subscripts disappear.
It's really something of a tragedy that Amazon has captured the e-reader market with its incompetent page rendering. I wonder if there are any plans to fix it.