The time students spend using mobile devices is making an impact on the reading experience both inside and outside the classroom. The authors--a doctoral student and a fourth-grade language arts and science teacher--designed and implemented a unit on landforms that included nonfiction reading, with both traditional print books and eBooks on iPads, along with research on student-selected topics. In this article they outline their discoveries for the landform unit, as well as the assignments. The then describe the research process and draw conclusions, based on teacher observation, a variety of assessments, and student interviews.