I am currently listing several books. If you would like to purchase multiple books at the same time, I can create a combined listing for you, so please feel free to inquire. (This may not be possible depending on the thickness of the books.) I purchased these books new from a bookstore and read them a few times. They have been stored on a bookshelf since then. "Logical Thinking Problems That Only Smart People Can Solve" Diamond Inc. Price: 1800 yen + tax #book