This baseball book is the bible on how to bat that all others are measured against. One reason is that stop motion photography is used to analyze a number of great hitters' swings. It is an fantastic example of how good visualization and information design can transform a written explanation into something much more powerful.

It is out of print, but still relatively easy to get. The original price for this book was $30, but expect to pay $40-$120 for a copy in good condition now.

I recommend this for both players looking to improve their swing and for graphic designers looking for inspiration.