This document discusses the LEARNMIX project which aims to develop a next-generation eTextbook platform. It seeks a balanced solution for publishers, teachers, and students. The vision is for eTextbooks to become an output of learning rather than just an input, incorporating professionally produced content as well as content created by teachers and students. The document also examines approaches for observing eTextbook use both online through analytics and offline through lesson observation, noting limitations and the potential of the TinCan API to provide a common framework.