“This book is incredible. You absolutely have to read it.” Ah, these words. More than mere validation for authors who spend so much time in uncertain solitude, they are payment and a generous tip for all the pain endured on the road from first thought to last word. They are the perfect reward. “It’s a good book.” “A great read.” “So well-written.” These are fine words, too. Encouraging words. We’ll take them above silence any day. But they fall far short of “you have to read this,” which, when expanded to its original size, looks something like this: “If you don’t read this book, you won’t merely have missed out…