I've read each of these books several times and stored them on my bookshelf. I think they are in good condition. There are no detached pages from the separate volume of "Why They Became Extinct." Thank you very much. "Zoku-Zoku Zannen na Ikimono Jiten" (The Continuing, Continuing Encyclopedia of Regrettable Creatures) Tadaaki Imaizumi Price: ¥980 "Zannen na Ikimono Jiten: Omoshiroi! Shinka no Fushigi" (Encyclopedia of Regrettable Creatures: Interesting! The Mysteries of Evolution) Tadaaki Imaizumi / Fumie Shimoma / Akiko Tokunaga / Fuyumi Kawamura Price: ¥900 "Wake Atte Zetsumetsu Shimashita. Sekai ichi Omoshiroi Zetsumetsu Shita Ikimono Zukan" (They Became Extinct for a Reason. The World's Most Interesting Illustrated Book of Extinct Creatures) Tadaaki Imaizumi / Takashi Maruyama / Masanori Sato Price: ¥1000 "Zoku Wake Atte Zetsumetsu Shimashita. Sekai ichi Omoshiroi Zetsumetsu Shita Ikimono Zukan" (They Became Extinct for a Reason, Continued. The World's Most Interesting Illustrated Book of Extinct Creatures) Tadaaki Imaizumi / Takashi Maruyama / Masanori Sato Price: ¥1000 #TadaakiImaizumi #Tadaaki_Imaizumi #TakashiMaruyama #Takashi_Maruyama #MasanoriSato #Masanori_Sato #books #nature/biology #ZannenNaIkimono #WakeAtte