"The Mystery of the Yagura △4-5 Pawn Rebound: Why Did the ▲4-6 Silver/3-7 Knight Formation Disappear?" Yasuaki Tsukada Price: ¥1540 + tax "Yagura 5-3 Silver Right-Side Strategy: The Revolution of Attacking and Winning as Black in Yagura" Akira Nishio Price: ¥1840 + tax The contents are in good condition without any writing, but there are scratches and scuffs on the cover and top edges.