This document describes the eMysteries project, which aims to engage upper secondary students in close reading activities through detective stories accessed on mobile devices. Funded by the Erasmus+ program, the project involves partners from Germany, Portugal, Cyprus, Ireland, and Spain developing an interactive online environment for writing detective stories, a MOOC for teacher training, and hosting multiplier events and a final conference to disseminate the resources developed. The goal is to improve literacy skills while harnessing the educational potential of mobile technology.