Rising paper prices are forcing publishers to change. Economist: Publishing can, then, find the paper for the things it wants to print, even in times of scarcity. The industry is currently experiencing another period of shortage, and war is once again a cause (along with the pandemic). In the past 12 months the cost of paper used by British book publishers has risen by 70%. Supplies are erratic as well as expensive: paper mills have taken to switching off on days when electricity is too pricey. The card used in hardback covers has at times been all but unobtainable. The entire trade is in trouble. Not every author is affected: a new thriller by Robert Galbraith, better known as J.K. Rowling, is a 1,024-page whopper — and this week reached the top of the bestseller lists in Britain. But other books are having to change a bit. Pick up a