Clifton Fadiman assembled a couple of anthologies of stories featuring mathematics and/or mathematicians as main characters.  

**Fantasia Mathematica**

http://www.amazon.com/Fantasia-Mathematica-Clifton-Fadiman/dp/0387949313/

**The Mathematical Magpie**

http://www.amazon.com/Mathematical-Magpie-Clifton-Fadiman/dp/038794950X

Some are good, some are not so good.