While reading circles have been utilized to promote extensive reading in many educational settings, studies on higher levels of reading engagement in under-researched, English-as-a-foreign-language contexts are still in their infancy. Therefore, the current study examines the factors that increase learners' levels of engagement in extensive reading tasks. I used learner diaries to collect data from 60 undergraduate students (ages 19-23) learning English as a foreign language in Mali. The findings suggested that cohesive groups with positive norms, behavioral changes during the task (e.g., investing an exceptional effort to achieve a significant learning goal, such as reading an entire story or a novel), and enjoyment after completing a reading task corresponded with these learners' high engagement levels in extensive reading. Although the findings of this study are specific to one group of language learners, they can still be applied to plan classroom interventions in other EFL contexts to promote learners' reading engagement.