Situated in a post-secondary EFL classroom, this qualitative study explores two first-year non-English department students’ reading motivation sources. The students did extensive reading that was embedded in an English class and used the Xreading platform to provide reading materials and record the students’ reading. Data was collected from students’ reading record in Xreading and interviews with the students. From the data analysis, it was evident that students developed a book selection strategy that potentially improved their internal reading motivation. The students also benefited from the reading target set by the teacher and the self-monitoring of their reading progress in Xreading. The reading target was able to motivate the students externally. This study concluded that freedom of book selection and reading target served as a source in motivating students to read. More pedagogical implications will also be discussed.