While there is a wealth of sound business advice available online, some experts believe that advice can be enhanced even further when entrepreneurs take it upon themselves to read business books as well. One such expert is Tim Berry, who recently called business books "the best buy in business" on his Entrepreneur magazine blog, Up and Running.

The books simply make business sense, Berry Says. He points out that a $15 or $20 book could pay for itself if its advice helped a single employee save just half an hour of the company's time.

Giving the example of a copywriting book he recently ordered online, Berry explains that business books are relevant, simple and easy to share. And the information is just as valuable in print or e-book form.

"The same is true for any of the business books I've bought (and the ones I've written, too, by the way)," he writes. "If they're any good, they pay for themselves almost instantly."

Individuals thinking about a small business opportunity may want to investigate some of the titles recently named to Bloomberg's list of the top 50 business books published since January 1, 2009. The list includes "What the Dog Saw" by Malcolm Gladwell and "SuperFreakonomics" by Steven D. Levitt and Stephen J. Dubner.

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