Zappos CEO Tony Hsieh shares 4 business books he thinks everyone should read

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Zappos CEO Tony Hsieh.

Zappos CEO Tony Hsieh wants his employees to continuously explore new ideas. That's why there's a library of some of his favorite books at Zappos' Las Vegas headquarters.

Over the years he's recommended well over 20 business books - including his own, the 2010 bestseller "Delivering Happiness" - and you can always find what he's currently reading atop his cluttered desk.

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"It's always interesting just to learn different perspectives, but to be careful of not trying to just say, 'Oh this book is the Bible, and we should copy that,'" Hsieh told Business Insider. "Instead, I want us t0 take the parts that make sense for Zappos and try to incorporate them."

Hsieh shared with us the four books he's recommending to everyone at the moment.