Critical thinking is a skill needed in the 21st century. In the learning process must develop the ability to think critically. Teaching materials used in lectures facilitate students' critical thinking. This study aims to determine the impact of using hyperbooks on students' critical thinking. Participants in this study amounted to 25 students. The research method used is a weak experiment by comparing the results of the pre-test and post-test. The results showed that there was an increase in students' critical thinking. Utilization of hyperbooks can improve students' reading comprehension skills which leads to students' critical thinking.