This is a set of four books: the first three books in the Michiru Fushino Kikiseki Tsūran series, and one doujinshi (self-published) book by the author. The books included are: * Akatsuki no Hoshi (Morning Star) * Mumyō no Yami (Nameless Darkness) * Kochū no Ten (Heaven in a Jar) * (Doujinshi) Aketa Yoru no Mado kara (From the Opened Night Window) They have been kept in a dark place with bookstore covers, so I believe the condition is good. Please understand that these are used items.