Take your own GPS-guided tour of Gangland Chicago with Jonathan Eig, best-selling author of Get Capone.

Your iPhone will take you from Al Capone's humble house on the South Side to the vacant lot where seven men died in the St. Valentine's Day Massacre. Along the way stop off at some of the bars where Capone supplied the beer.

You get crisp photos of historic crime scenes as they appear today, accompanied by Eig's brief essays on the men and the murders that made Gangland Chicago such a legend. Eig is a longtime Chicagoan and his brilliant historical summaries were written exclusively for this app.

And if you're reading Get Capone, you can use this app to see where the crimes took place and what the sites look like today.

When you're done, you'll know Gangland Chicago better than Al Capone himself.

Jonathan Eig is the New York Times best-selling author of Get Capone and other books. He's a longtime resident of Chicago and a former reporter for Chicago magazine and The Wall Street Journal.

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