Yaaaaay! A page reading challenge is where one or more persons challenge themselves/each other to read a certain # of pages per day or week, perhaps attempt to increase over time if life allows. I don't necessarily know if it's been done before, but practically no idea is original so I'm assuming some fellow geeks have done it!
It's a frequent thing for people who are trying to read the entire Bible in one year. And some other book clubs have started the practice. It's a nice reminder to stop and take time for you, even when other things are calling. Kinda like having a workout buddy that helps keep you motivated.