Horace Holley The Kitáb-i-Íqán : A Study Guide The Kitáb-i-Íqán The Book of Certitude : A Study Guide - Wilmette, IL Baha'i Publishing Trust 1975 - 11 p. Subjects--Topical Terms: Study Guides--Baha'i FaithBibliographic Resources--Baha'i Faith