Iron Druid Chronicles - its about a young, funny guy, who also happens to have access to magic. Its set in modern day America, oh and hes the last druid; and 2000 years old, technically.

The Dresden Files - think of it as if harry potter had grown up, become a full wizard, opened a detective agency in Chicago and then slowly became a bit bitter and experienced. As one bad thing after another kept happening to him as he fights the creatures and bad guys

He who fights with Monsters - A guy called Jason gets transported to a world where magic is real and is given a game like system user interface to help him navigate through the new world

Any of those sound good?, oh and they are all available as audio books too