I can't honestly say whether manga is compatible or not yet as I don't read manga so I'm not really up on that market. I'm sure if it isn't now it will be in the future. I don't see why it wouldn't be since it's the same general format as a book, just with illustrations in addition to words. Though it's already made strides in technological terms, ebooks and the supporting technology is still very much an emerging market so it may be awhile before we can see the full range of features it can offer. I'm sure if you check around a bit you can find something about manga compatibility.

Either way, paper or digital, you should read more books anyways. XD I need to read more myself.

~DragonHeart~