Encyclopedias are great for:
Oxford Bibliographies: Jewish Studies
Excellent peer-reviewed annotated bibliographies.
Oxford bibliographies. Islamic studies
Peer-reviewed annotated bibliographies on the range of lived experiences and textual traditions of Muslims as they are articulated in various countries and regions throughout the world.
Oxford Handbooks Online: Scholarly Research Reviews
Includes such titles as: The Oxford handbook of Islam and politics  The Oxford handbook of the history of nationalism 2013 The Oxford handbook of Iranian history c2012
A classic and excellent resource on all aspects of Jewish culture and Israel.