"I'm working hard, but I'm not seeing results..." This is Hiroyuki's self-study method that solves such worries. How to have an easy time and how to surely acquire knowledge without being swayed by the "common sense" of the world. This is packed with eye-opening strategies. • Price: 1,540 yen (tax included) • Condition: With obi. There are spots on the cover. • Other: No smokers or pets. It's packed with hints for living wisely in the modern age. How about taking this opportunity?