LED Bookmark Reading Light is a tiny and cute reading mate for active readers who read a book even at night before bed. I really like reading books and I sometimes read a book before bed even after turning off the light. From my life experience, I made a tiny little reading mate which lights up when reading books. My idea was combining a bookmark and a reading light. Also, to control the light, I used a sliding potentiometer as a variable resistor and also designed it as a product. I wanted to make a practical product with the Arduino for this project.