Which major retail bookstore chain's logo incorporates an ancient philosophical symbol representing wisdom and knowledge?

Many religious and philosophical symbols have been incorporated into corporate logos throughout history, sometimes sparking controversy and other times going largely unnoticed. This trivia question explores how ancient spiritual symbolism intersects with modern commercial branding in the marketplace of ideas. Test your knowledge about the origins and meanings behind these visual elements that bridge the sacred and secular worlds.

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Barnes & Noble (with the noble reader silhouette)
Books-A-Million (with the open book design)
Borders (with the wisdom tree imagery)
Half Price Books (with the ancient yin-yang symbol)