Esper Connection Series 1-4 by Yoshinori Shimizu, Sonorama Bunko 1. Heretic of the Divine Realm, 5th edition, May 1983 2. Magician of the Sky, 4th edition, May 1983 3. Alien Gods, 4th edition, May 1983 4. Dark Destroyer King, 3rd edition, July 1983 Due to home storage, there is some yellowing and creasing of the books due to aging, but I think there is no problem with reading them. Please understand that these are used books before purchasing.