Penguin Random House acquired a significant minority ownership stake in Sourcebooks, one of the country's fastest-growing independent publishers. The transaction will create a performance- and growth-oriented partnership between the two companies. Sourcebooks retains its majority ownership of 55%, with no changes in its leadership, management, publishing autonomy, or entrepreneurial culture. Penguin Random House now owns 45%, as a collaborative investor in the Illinois-based company. Terms were not disclosed. "Sourcebooks is an amazing success story with an extraordinarily strong track record of building sustainable growth," said Madeline McIntosh, "and Dominique is a great publisher and entrepreneur whom I have long admired. We now have a singular opportunity to forge a partnership of shared vision and values, and together grow our businesses, as we shape readers' lives through the books we publish."