I've discussed and researched facts and reviews about all the multi-volume Bible Dictionaries that have been issued in English since the '70s, and found the New Interpreter's Dictionary of the Bible (5 vols.) to be the very best! In addition to that it must be the most recent - a valid concern when it comes to Bible dictionaries, the Editors seem good, and it had many contributors.
It's pretty cheap on pre-pub for a five-volume Bible dictionary.
I have it as printed matter.
Oh, and lest I forget, it has another feature that surely adds value: article entry headwords are also in non-transliterated Greek, i.e. with the Greek alphabet - so double clicking Gk words in Your books or Gk Bible will be opening up the NIDB if an entry found.
I'm not that biased, I don't have an order for the New Interpreter's Bible Commentary.
If You want to find out a little bit about me, look at my Faithlife profile and perhaps recent posts.