An article helps pastors and Christian workers in building a Christian Reference Library to use in producing sermons and classes. I introduce the new Bible student to three free Bible programs, and offer some considerations:
(1) When you have no books on a subject.
(2) When you cannot find information of a Bible subject.
(3) When you cannot discern how much the author discusses the subject.
(4) You are searching for the wrong key word.

Note: on my site, twmodules.com, I offer 2500+ free books for Bible study, and another 500+ books on thewordmodules.com. Also, I offer on https://theword-modules.com/ Bibles for theWord, theword-dictionary-modules.com 140+ dictionaries, concordances, lexicons, etc. for theWord, and on https://www.theword-commentary-modules.com/ I offer some 500+ Bible commentaries for theWord. All of these are free for the downloading, so if you have an Internet connection and some time and space on your hard drive, you can assemble a Christian library of around 3800 works. All free.
See this page for more articles on improving your preaching.