Bible Handbooks - Offer basics; a good place to begin on getting acquainted with the historical-cultural context.
OT and NT Introductions and Surveys - Go into greater details than Bible handbooks, so there is too much info to fit into a single volume.
Commentaries - Best bet for up-to-date info. Always a good idea to consult different commentaries due to the writers point of view
Bible Atlas - people, places, events...maps, political culture, etc.
Bible Dictionary and Encyclopedia - More info about a particular topic mentioned in a passage (Garden of Gethsemane).
Background Commentary - New type of commentary focuses not on the meaning of each passage, but on the historical-cultural background essential to grasping the meaning.
OT/NT Histories - Detailed background information on particular topics within a passage.
Study in ancient life and culture - Detailed discussions on selected topics. Dig deep on a particular topic. Biblical cities, social life, legal matter, s warfare, economic life, etc.