Our university libraries’ e-textbook initiative provides students free access to required course titles. It includes an interface for faculty members to search for course-appropriate titles, and a page for students to access materials for their courses. Dave and Emily have conducted multiple iterations of usability testing on both interfaces. In addition, we tested students’ ability to search and navigate eBooks from four major vendor platforms. In this presentation, Dave will discuss their testing methods and highlight the findings. He will also discuss lessons learned and next steps.