Browse these Bible dictionaries and encyclopedias for entries on either 1) the biblical book you're writing, or 2) a topic related to the passage you've been assigned, for example, a point of information, a term, a theme, or whatever.
See 1) the first box and 2) pp. 7 and following of the PDF document labelled Basic English-Bible Reference in the second box here for longer lists of Bible dictionaries and encyclopedias online and on paper. Or search the Advanced Search sector of the Library catalog as follows: Search Scope: SPU LIbrary, Subject contains (Bible OR Biblical) AND (Dictionaries OR Encyclopedias):