This is the full set of Biography of Four Caliph Of Islam Published by Darussalam Publications
Author For All Books is Dr Ali Muhammad Muhammad As-Sallaabee
This series of Books covers the different aspects of the lives of:
1-Abu Bakr As-Siddeeq (One Complete Book)
2-Umar ibn Al-Khattaab (R) (2 Vol. Set)
3-Uthman Ibn Affan (R) – Zun-Noorayn (One Complete Book)
4-Ali ibn Abi Talib (2 Vol. Set)