I seem to be doing this more and more often.  A book I selected, either on Amazon or in the library, turns out to be such a let-down that I don't bother reading past the first few pages. The other day I returned 6 books to the library, 5 of them unread.  I checked out 6 more, based on a list I made at home of authors who looked promising.  It's been 48 hours and 4 have already been eliminated. It…