This is the "Amazing Secret Techniques Best Catalog." It's packed with valuable information that you'll benefit from knowing, and everything is immediately practical. It also comes with a supplementary booklet, "Dark Goods You Can Buy on Amazon: The Complete Guide to Amazing Techniques for Home Appliances, PCs, and Gadgets." This booklet is a compilation of 5 years' worth of information, allowing you to quickly access past deals. This is a set of books with great deals, so please consider purchasing if you're interested. Both books, as shown in the 4th and 5th photos, have a single mark on the inside of the spine where a sticker has been removed. It's not very noticeable since it's inside the book, but please understand that these are used books and are sold as-is, with no returns. Overall, the books are in very good condition. * Amazing Secret Techniques Best Catalog * Sansai Books * 1540 yen (tax included) * 147 pages total (supplementary booklet: 99 pages total) Thank you.