Incomplete 15 volume set of Syed Mehdi Ayatullahi's The Introduction to Infallibles, Ansaryian Publications, Qum, Islamic Republic of Iran, 2002.  Illustrated staple-bound booklets, approximately 25 page each.  Contains: 

Vol 4: The Fourth Infallible; Hazrat Imam Hassan (A.S.) 

Vol 5: The Fifth Infallible; Hazrat Imam Hussain (A.S.) 

Vol 6: The sixth Infallible; Hazrat Imam Zain ul Abidin (A.S.)  - TWO COPIES

Vol 7: The Seventh Infallible; Hazrat Imam Mohammad Baqir (A.S.) - TWO COPIES 

Vol 8: The Eighth Infallible; Hazrat Imam Jaffar-e Sadiq (A.S.) - TWO COPIES

Vol 9: The Ninth Infallible; Hazrat Imam Musa Kazim (A.S.) - TWO COPIES

Vol 10: The Tenth Infallible; Hazrat Imam Reza (A.S.) 

Vol 11: The Eleventh Infallible; Hazrat Imam Mohammad Taqi (A.S.) - TWO COPIES

Vol 12: The Twelfth Infallible; Hazrat Imam Ali Naqi (A.S.) 

Vol 13: The Thirteenth Infallible; Hazrat Imam Hassan Askari (A.S.)