There is a good set of small books available that would serve your church well to put on display and hand out to visitors or church attendees as needed.
It is series produced by Reformation Trust, which is a division of Ligonier Ministries, entitled “Crucial Questions.” There are twenty-two of these books (roughly sixty pages in length each):
- Who Is Jesus?
- Can I Trust the Bible?
- Does Prayer Change Things?
- Can I Know God’s Will?
- How Should I Live in This World?
- What Does It Mean to Be Born Again?
- Can I Be Sure I’m Saved?
- What Is Faith?
- What Can I Do With My Guilt?
- What Is the Trinity?
- What Is Baptism?
- Can I Have Joy in My Life?
- Who is the Holy Spirit?
- Does God Control Everything?
- How Can I Develop a Christian Conscience?
- What Is the Lord’s Supper?
- What Is the Church?
- What Is Repentance?
- What Is the Relationship Between Church and State?
- Are These the Last Days?
- What Is the Great Commission?
- Can I Lose My Salvation?
I can foresee churches or pastors giving these books out as a quick resource for inquiring minds.
I have only read two of these books – Can I Lose My Salvation? and What Is the Relationship Between Church and State?, and I found both of them to be simple to understand, and cover more issues than expected in such a short space.
By the way, I noticed they are a free download if you are an e-reader!