"Logical Thinking Problems Only Smart People Can Solve" Price: - #Books I bought this new and removed the cover immediately to read it. Due to the book's construction, there are creases on the outside when it's opened. I only read it for about two days, and it was stored on a shelf at home for about a month. I think there are no other scratches besides the creases on the outside. This is a used book, so please purchase only if you understand. Shipping will be done using the least expensive method.