"Teihon Toroidal Core Handbook: Theory, Construction, and Application Circuits of Toroidal Coils" Hideho Yamamura Price: ¥3200 #HidehoYamamura #Hideho_Yamamura #book #electricity/machinery/electronic_communication The cover has scratches and scuffs, but there are no writings or markings inside. I use materials I have at home for packaging. I am not currently considering a price reduction. Thank you for your understanding.