Nancy Drew Files Case #55 Don't Look Twice by Carolyn Keene (1991, Mass Market). Get ready for a thrilling adventure with Don't Look Twice, a captivating book from the renowned author Carolyn Keene. This Mass Market format book, published by Simon Pulse in 1991, is perfect for readers of all ages who love mysteries and detective stories. The book is part of The Nancy Drew Files series and features 160 pages of heart-pumping action and suspense. With an illustrator on board, this book is a true gem for any book lover. It weighs 2.9 Oz and is written in English. The book's topic is general, and it falls under the categories of Books and Books & Magazines. If you're looking for a juvenile fiction book that will keep you on the edge of your seat, Don't Look Twice is the perfect choice for you.