Vook, the digital media company turning publishers' titles into interactive videos, has signed up its second book partner in HarperStudio. After the company debuted its first vooks with Simon & Schuster, Gary Vaynerchuk’s Crush It!, published this month by HarperStudio, bowed in the format. Vaynerchuk, who discusses his path to success in the book--while expanding his family's wine business he became an unexpected online tastemaker/social media force--appears in various videos for the vook.

HarperStudio is the second house to partner with Vook, after S&S. The company, when it debuted its vooks in late September, said it was in talks with various other houses about parnerships.