"The Book That Develops the Vocabulary of Capable People" #VocabularyImprovementResearchGroup #Book #Society/General "160 Techniques to Eliminate Mistakes" #Takashi Nakajima "With This One Book! A Dictionary of "Adult Expressions" for Pleasant Conversations" "With This One Book! A "Business Vocabulary" Notebook for Intelligent Communication" #Best Life Network "Super Translation: The Absolute Rules of "The Person Who Wins in the End" from The Art of War" #Yoshifumi Taguchi "The Art of Thinking Clearly" #Shigehiko Toyama Set of 6 books. Alcohol-sterilized.