I use a flatbed, but wondered about hand held scanners for books that I didn't want to open fully, as that wound strain the binding.
I found wobble, etc., a problem with the latter, unless a frame was used- and that wouldn't help with most because the scanner wouldn't get the print on the page closest to the binder.

Camera is best but slower (for me, anyway), and a good digital produces an excellent image. Another step or two is involved if scanning to email is needed.