How often do you read a book?
Do you find it is too dark when you read at night?
Do you want a product that can help you to hold the book?
Do you annoy that you have to stop to turn to another page when you are practicing instruments?
Do you have something to keep the page that you read last time?
what material do you want the products looks like?
How big do you think is the best for you to put at home?