Let's say we have a device that allows to view book pages over Internet without persistently storing it in any tangible medium (like a memory card). I.e. without "fixing" it permanently where "fixing" is defined in 17 US Code 101. And we use it to view books from a remote server. In this case it seems like we are not making a "copy"; we simply let user watch book stored on our server. So this should be legal?