Sometimes subject specific resources can be really helpful. There are a number of resources that will be helpful to you if you are studying Philosophy, either as part of your course or as your major discipline. 

Resources (Books)


Relativism - Feet Firmly Planted in Mid Air - Greg Koukl and Francis J. Beckwith
Escape from Reason - Francis Schaeffer
Love Your God With All Your Mind - J.P. Moreland 


Introduction to Philosophy - Norman Geisler
Baker Encyclopedia of Christian Apologetics - Norman Geisler
Christian Apologetics - Norman Geisler
The God Who is There - Francis Schaeffer
Mere Christianity - C.S. Lewis
The Universe Next Door - James Sire 


He is There and He is Not Silent - Francis Schaeffer
Philosophical Foundations for a Christian Worldview - J.P. Moreland and William Lane Craig
Warranted Christian Belief - Alvin Plantinga
Scaling the Secular City - J.P. Moreland
The Case For God - Peter S. Williams
Reasonable Faith - William Lane Craig
The Gagging of God - D.A. Carson
The Rationality of Theism - Paul Copan and Paul K. Moser 

Resources (Other)

Evangelical Philosophical Society here and their journal Philosophia Christi