※I'm decluttering due to a sudden move. I'll be selling these items for a limited time, until around February 15th. Please understand that these are used items. Thank you. A book explaining problem-solving methods for business people. - Title: In-Basket Thinking - Publisher: WAVE Publishing - Author: Takashi Torihara - Series: Over 550,000 copies sold - Price: 1500 yen Thank you for looking.