My husband and I have been librarians in three churches of our 40 year marriage.
We read all the time. Very few people do.
The pastor at the last library got VERY frustrated because he put many of his good books in the section marked only for reference in the library, please do not remove or take home sort of thing. (It was open all week near the church office plus some evenings, and had comfortable chairs and good lights so people could use a book there). Expensive reference books disappeared anyway, or one book out of a set of commentaries. It is so weird to me how Christians can do that for the sake of bible study......maybe they feel they are entitled or something. If you put in commentary sets make sure you can deal emotionally with books disappearing forever.
We got good mileage out of CDs. John Piper was popular and we pushed his biographies, which are wonderful, for listening in the car. For many folks it was their first real introduction to church history and they loved them. We also saw interest in Tim Keller sets and other Piper sets like Romans and Hebrews, and hub put in a lot of heavier duty material like WTS CDs, but they were not popular. I can't say that even the CDs got a lot of usage, but it was way more than the books.
I drove over to CCEF and got a set of all their little booklets on various counseling subjects, and they got some usage along with counseling materials in general on marriage and family. We got some great DVD sets by RC Sproul to watch....far as I know wasted the money, hate to say.
Our current pastor does a book every month in the bulletin. Might be something basic by RC Sproul, or maybe a CCEF book, occasionally a kids book. I don't know if people read them but you could try.
I will add that we used to loan out books from our own collection. At one point I sent out 22 letters, snail mail, saying that you had borrowed the following book xxxxx, and if you were done could you please return it, and if you lost it or gave it away that was OK but could you please let us know the status of the book. Guess how many of our zealous Christian brethren responded. Two. Exactly two. One guy told my husband that he was mistaken and it wasn't our book but his book ( it was ours) which by the grace of God was so ludicrous if you knew the situation when he borrowed it, that we joked about it together for years.
All I can say is, its your money or the church money and don't part with anything you can't afford to lose, and don't have high expectations. And by the way a sign out notebook with columns for title and name of borrower and date is simpler than going through the library card routine.
I will pray for you tonight. I applaud your hearts desire. May the Lord grant you some hungry sheep.