A two-book set for adults to learn study methods and how smart people speak. The contents are relatively clean, but they have been stored for a long time, so there may be some wear and tear, and not completely free of stains. Please understand that these are used items. - Title: Study Methods for Adults - Author: Hideki Wada - Title: How Smart and Unintelligent People Speak - Author: Hiroshi Hosoguchi Thank you for looking.