Dr. William Lane Craig is one of the premiere apologists of our day. He has debated atheists and left them scratching their heads with the profound nature of his arguments. Dr. Craig is especially known for his resurrection of the Kalaam Cosmological Argument and for his arguments for the literal bodily resurrection of Jesus.
If you are interested in apologetics, start here before engaging Craig's other works, especially his masterpiece "Reasonable Faith." If you are able to master the arguments in this work, then you will be better prepared for the articulate and detailed arguments given in "Reasonable Faith." I highly recommend this book for everyone. This book is good for those of all ages and all backgrounds.
For the Christian, your faith will be strengthened. For the skeptic, many of your questions will be answered. For the atheist, your beliefs will be challenged.