Could not answer / Ziya ül-kulûb. English Harputlu İshak, -1891 or 1892. Islam Apologetic works. Islam Relations Christianity. Christianity Controversial literature. 297 COU Written by Is-haq Efendi of Harput. Istanbul, Turkey : Hakîkat Kitabevi, 1997 1997 2004 Text 426 p. ; eng Waqf Ikhlas publications ; no. 13 Waqf Ikhlas publications ; no. 13.