This article describes a co-teaching collaboration between an instructor and an academic librarian, working together to deliver an innovative, inquiry-based course offered to first- and second-year university students. The authors describe the context for this relationship and the methods that were used to ensure that this collaboration intentionally and purposefully met the course objectives and students' needs. The interaction between the instructor and librarian could best be described as a co-teaching mentorship in which both were responsible for teaching and working with the students as well as reflecting on the learning benefits that this opportunity provided for students as well as for each other. [Articles in this journal were presented at the University of Calgary Conference on Postsecondary Learning and Teaching.]