There’s been an unfortunate increase in the last four of five years of people who want to offer critical, opinionated reviews of books they haven’t read. This is usually done in an effort to prevent anyone else reading the book. A review of a book the author hasn’t read is, on the face of it, such an odd idea that many people are surprised it happens. It not only happens, it’s become downright common. The habit of critiquing a book the critiquer or reviewer has not read is in part related to people who want to ban books that they take issue with; like the parents of Litchfield, N.H. who…