【Product Description】 A set of 6 books useful for business and self-improvement. All are used books, but there are no noticeable scratches or stains. 【Titles】 ・The Book That Can Explain Important Things in an Instant ・Become 3 Times Faster! Speed Reading Training ・Speed Reading Drill That Takes 27 Hours ・1-Minute Memory Method ・Lessons on the Power to Convey Your Thoughts ・Rules and Manners of How to Speak and Communicate Recommended for those who want to learn together.