Good Day AEvans
1) can be read using various hand-held devices such as, "kindle" I believe one of them are called; thus they are convenient for people on the go.
2) many, dozens, perhaps hundreds of books can be uploaded onto such small devices.
3) you don't have to worry about spilling coffee all over your book or accidentally ripping pages or breaking the spine
4) being e-books, I suppose it might be easy to mark and electronically "share" passages you might find especially important or moving with your friends over cyberspace; this being the case, you can add some sound effects, music, and the like to dress up the presentation, if that makes sense.
1) some people might say that e-books takes you away from the good old fashioned tactility of handling a "real" book, turning the pages, etc., even risking the odd paper cut from time to time.
2) as a corollary to that old fasioned book stores and libraries may face decline as more and more people use the computer to do their reading; a similar situation is pointed to in the music business; I understand many people had a cry-a-thon when Tower Records closed down.
3) E-books and e-music, and e-everything is a double-edged sword; on the one hand it allows you to communicate with a much wider spectrum of people than ever before in human history; but we just have to be careful that the computer doesn't become a stand-in for tactile connection with the people who are in physical proximity to us, those we could be with if we just turned off the computer and walked down the street, or went into the living room.