Mobile E-publishing (or electronic publishing) comprises the digital production of books, newspapers, magazines, textbooks and other published assets The newspaper and magazine industry has struggled to find viable business models in the digital age. Several revenue-generating models have been implemented to varying degrees of success, but they have achieved no significant inroads. These models have included digital distribution, online advertising, open access and subscription. The resources below take a deeper look at these models. E-books have been growing steadily in popularity. Sales of e-books now rival those of their paper counterparts. With established digital reading devices, robust distribution from vendors such as Amazon and Apple, and consumer attitudes that e-books are worth paying for, the e-book industry has seen the greatest success within the e-publishing market.