It sends a chunk of a book everyday to your phone. Each chunk takes about ten minutes to read and you can choose from a wide range of classics from Alice in Wonderland to War and Peace.
I just finished reading Jack London's 'Call of the Wild' which I really enjoyed and I found the daily chunks worked really well. I even upgraded to the paid version so I could skip ahead. I found ten minutes was achievable on most days. Plus if I felt it was getting away from me I could pause the serial so I didn't end up with three hours worth of reading mocking me for not finding the time. I reckon young people would enjoy the format, after all ten minutes is equivalent to a loo trip or a wait for a bus. Plus you get reward badges as you read which include fun little reading related facts.