In the introduction portion of this two-part book, Geisler examines the realities of the Christian faith, including the existence of God, the reality of truth, the nature of revelation, and guidelines for interpretation.
From a precursory glance at the material, one would think that it were a true theological discussion. It is arranged to look as if it is, with the prolegomena, theology proper & creation, soteriology & ecclesiology & eschatology. But on a closer reading, it begins to become clear that it is more theological proposition and theological answer to 'said' question. He quotes a lot of evidence from Christian based texts such as Reformation and post-Reformation era Christian writers, and at times modern Christian writers on the subject. What is missing is a deeper discussion and expression of critical thinking on the subject. To simply regurgitate what others have said, is not a theological discussion but more a reference volume on what others have thought about the topics given.
There is one area that was of interest, however, and that was the smallish section on miracles. (might not be in volume 1). He lists miracles and what the common arguments are toward them; and in this he braves some philosophical discussion that gives the reader something to sink his/her mental teeth into. But, then he digresses shortly thereafter (chasing philosophical rabbits when he lambasts Hume or Kant)
It is also quite easy to see which side of the issue Geisler is on. It has been said that he is a dispensationalist and quite likely a Thomistic philosopher, and given that, even his first volume is riddled with claims that are only half backed up with anything approaching validity.