QR codes — the square blotches you’re seeing on billboards, packaging, websites, book covers, and elsewhere –give mobile device users keys to unlock a whole universe of bonus content and hidden information. Now McGraw-Hill takes readers inside that universe — literally — by leading the charge to enhance book pages with QR tech.

An article in Publishers Weekly explains how McGraw-Hill is using QRs to engage readers on a deeper level:

“For The Zappos Experience: 5 Principles to Inspire, Engage, and WOW, publisher McGraw-Hill partnered with Link.Me, a tech startup whose goal is to connect publishers with, and increase, their reading audience. When scanned, the QR codes in the book access supporting multimedia content like a Facebook page devoted to ‘Delivering Happiness’ or behind-the-scenes video clips of Zappos’ conference room and its employees’ Nerf battle at headquarters. ‘This is one of the first times that a publisher is embedding QR codes throughout a book, not just on the jacket,’ said Antony McGregor Dey, CEO of Link.Me. ‘This interactive experience really enhances the reader’s level of engagement.’”

Click here to Learn More about how QR code-enhanced books are breaking down the walls between books and the world of digital media.