Chegg's new relationship with the Ingram Content Group could be key to Chegg expanding in digital textbook markets, The New York Times reported. Chegg was founded as a textbook-rental business and of late has been pushing to grow in e-texts. The Times noted that a major challenge for Chegg has been buying and distributing print textbooks, and that the deal with Ingram -- which will provide the physical texts -- frees Chegg to expand elsewhere.