This action research aimed to evaluate the impact of personalized reading plans on first-grade students' reading engagement and comprehension. Personalized reading plans were created for each student based on their interests and reading abilities within an e-book library. Qualitative and quantitative data were gathered from 10 first-grade students before and during the implementation of personalized reading plans. Overall, students showed an increase in reading engagement and spent less time engaging in off-task behaviors during the implementation of personalized reading plans. Additionally, system log data revealed an increase in the amount of time students spent reading e-books. However, there was a considerable decrease in the number of quizzes taken during the implementation, and students' reading comprehension scores did not improve after implementing the personalized reading plans.