"The Story of Complex Numbers: Mastering Invisible Numbers" Hiroho Takao Price: ¥1700 #HirohoTakao #Hiroho_Takao #Books #Nature/Mathematics The cover has minor scratches, and the spine is discolored due to sun exposure. There is also some staining on the inside back cover, but no writing or markings. The inside is clean with little sign of use. Packing materials will be reused from home. I am not currently considering price reductions. Thank you for your understanding.