When Anita Givens, who serves the Texas Education Agency (TEA) as the senior director for instructional materials and educational technology, first began teaching elementary school students to use computers back in the mid-1980s, there were few digital learning materials available and little demand for electronic textbooks. In fact, parents and educators worried that the advent of computers in schools would result in students' spending too much time in the company of computer monitors, and not enough time with real books. However, 20 years after, teachers, parents, and especially students are embracing electronic educational content today in growing numbers. Givens' agency, for one, has made deployment of digital learning tools and content a priority. TEA has adopted electronic instructional materials and educational technologies from a range of publishers and "depositories," which store and distribute instructional materials for publishing companies. The influx of alternative digital content has actually altered Texas' formal definition of "textbook" to include electronic media. In this article, the author discusses how traditional textbook publishers are rushing to adjust to a changing market as K-12 educators show a growing interest in digital content. This article contains a sidebar entitled "Putting E-Content in Overdrive," which describes the OverDrive School Download Library, a service that delivers e-book and digital audio book downloads from a company-hosted website. (Contains 9 online resources.)