Looks neat. Could you add support for storing books in a storage system I control? I'd like to upload my books to somewhere that is under my control (google d

Looks neat. Could you add support for storing books in a storage system I control? I'd like to upload my books to somewhere that is under my control (google drive, dropbox, etc...). I've had bad experiences with services basically locking my library to them and making it nearly impossible to export/move them elsewhere. It's a nice plus for you, since you don't need to pay the storage costs yourself.