"The Plot" by Jean Hanff Korelitz; Celadon Books (336 pages, $28) ——— “Where did you get the idea for your book?” If you’ve ever been to an author event or a book signing, you’ve heard that question. If you’re a published author, you’ve heard it many, many times. For some authors, it’s welcome and flattering. For others, it provokes an inner eye roll. But the follow-up can make authors ...