The second edition of my favorite book on apologetics released last year:

John M. Frame. Apologetics: A Justification of Christian Belief. Edited by Joseph E. Torres. 2nd ed. Phillipsburg, NJ: P&R Publishing, 2015.  

This 78-page PDF sample includes the front matter, introduction, and chapter 1.

Check out these two interviews:

1. Justin Taylor interviews John Frame
2. Fred Zaspel interviews John Frame

And here are John Frame’s top five books on apologetics (HT: Ivan Mesa’s TGC interview):

1. C. S. Lewis, Mere Christianity
2. Cornelius Van Til, Christian Apologetics
3. Tim Keller, The Reason for God
4. Vern Poythress, Redeeming Science
5. William Edgar and Scott Oliphint, eds., Apologetics Past and Present (vol. 1 | vol. 2)