We know what the Book of Acts is all about...
Well, maybe. Sometimes it's known as the Book of the Acts of the Apostles authored by the Greek physician Luke. It is the history book of the New Testament. Others have "renamed" it the Acts of the Holy Spirit. That idea has a lot of merit. As the Holy Spirit comes into or indwells all believers in Jesus Christ as part of the New Covenant of God, He, the Spirit, acts in and through us.
Now mention the word "apologetics" and most people's eyes glaze over. That happens, I believe, because we don't understand what apologetics is. They think it's something that requires years of seminary study or professional training. We think of today's "big name" evangelists such as Billy or Franklin Graham, Luis Palau or Ravi Zacharias or any number of radio and television pastors.
Strictly speaking, apologetics is simply the ability of defending an idea. We see it done every day with a variety of ideas and even products. There's the "apologetics" of abortion or its opposite, the Right to Life. There's conservatism versus liberalism or a market economy versus a planned economy (capitalism v. socialism or communism).
Apologetics is the give and take of ideas based on a person's knowledge, belief or understanding of those ideas. It's not only what you believe, but why you believe what you believe.