I feel your pain! I can't call mine a book -- it is a big hard plastic index card holder. I left it once in a shopping cart at Rite Aid. I realized it about an hour later, went back, and they told me a nice elderly woman handed it in. I left it a second time at the grocery check out. I didn't realize until after closing, called the next day, and sure enough they had it for me at customer service. I felt sick both times! I keep all discounts in there, not just coupons, but $10 off rewards for Old Navy, restaurant coupons, etc. If it doesn't turn up retrace your steps and make some phone calls. Hopefully, you'll find it soon!