A systematic theology from the Pentecostal perspective as taught by the Assemblies of God, it surveys the doctrines found in the Bible. Horton's "Theology" includes 149 pages (a bit under 1/4 of the book) discussing the work of the Holy Spirit and His work in sanctification, baptism, spiritual gifts, and divine healing, which seems wholly missing in the more popular evangelical and scholarly systematic theologies (except for J. Rodman Williams, "Renewal Theology," which I also recommend).
This systematic work starts with a short history of Pentecostal history and the basis for Pentecostal theology before discussing the doctrines of inspiration, the existence and nature of God, angels and demons, Creation, Man, sin, the person and work of Christ – doctrines in every way the orthodox – and the Holy Spirit (as mentioned above; also orthodox, however, perhaps controversial to those who, not only disagree with Pentecostal theology but, mistakenly view it as heretical).
Although not as in-depth in handling certain controversial issues, nevertheless, it explores various views discusses their strengths and weaknesses from a Biblically Pentecostal perspective. Interesting enough, Horton's "Systematic Theology" briefly, yet, it seems adequately, discusses the controversial "Jesus Only" or "Oneness Pentecostalism," a little of it's history and doctrine, and soundly rejects it (comparing it to Modalism and Sabellianism) in favor of the doctrine of God's triune nature.
I recommend it for those who want to learn what are the main beliefs of Pentecostals, especially to those who adhere to whatever John MacArthur has to say, unjustifiably, against Pentecostals and Charismatics.
There is one slight drawback, which I must reluctantly note, and that is the editing of this book is less than desired; there are quite a few places where a word is misspelled or missing and maybe a couple of places where the sentence is convoluted. I do hope that with any further additions, they would redo the editing. It's distracting, at least, to me.