Others have apparently been brief in their reviews of Gillian Flynn’s “Gone Girl”. On the cover: “Thought-provoking. Entertaining. Chilling.” Agreed, on all three counts. This is the kind of book you’ve thanked the original friend recommending it profusely and who you’ve recommended to your mom, husband, bff, co-worker, random grocery store clerk, and library check-out girl. I can’t trust myself to say much about “Gone Girl” without divulging spoilers. Even uttering the title feels like I’ve said too much; see, there I go, hinting at spoilers. “Gone Girl” is a mystery, a good one. Enough said.