This is a great book. It uses Scripture and anecdotes to tell us what God is like, and how man is different from God. It is perhaps R. C. Sproul's best book. If you have never read one of R. C. Sproul's books, I recommend that you start with this one. If you only read one of his books in your life, it should be this one. It is very easy to understand and all Christians will agree with almost everything in it. It explains Scripture in a way that most Christians will applaud.
You might infer from the title that it is only about God the Father, but it includes the Son also. Another thing that you might not get from the title is that it explains that people are sinners, in contrast to the holiness of God. It shows how Biblical people like Moses, Isaiah, Simon Peter, and the Pharisees reacted to God (either the Father or Jesus) and how that reaction dramatizes the differences between people and God. Chapter 5, The Insanity of Luther, reviews the Biblical view that "no one is good - except God alone," and the Great Commandment. "For a good deed to pass the standard of God's goodness, it must flow out of a heart that loves God perfectly and loves our neighbor perfectly as well." Luther understood this, and it caused him to behave in ways that seemed to be insane.
Well, I read some one-star and three-star reviews of this book - I guess you can't write a great book about God without someone disagreeing with part of it. Dr. Sproul takes very seriously the passages in the Old Testament and the New Testament where God punishes someone severely, to uphold justice. Examples are Nadab, Abihu, and Uzzah, who were killed for sins that many people today would consider to be very minor. Some people try to figure out a way to ignore or explain away these Bible narratives. "But we cannot begin to understand divine mercy until we first have some understanding of divine justice." (page 109) This book will help you understand divine justice.
One chapter is about Martin Luther, and one reviewer could not accept that part of the book. Martin Luther struggled mightily to be good enough for God and to confess every sin he ever might have committed. Then he discovered in Paul's letter to the Romans that we are justified by faith, not by works.
There is a chapter about Jonathan Edwards and his sermon Sinners in the Hands of an Angry God, and that is too much for some, especially those who see only love in God. One reviewer objected to the quote of Edwards, "The God that holds you over the pit of hell, much as one holds a spider, or some loathsome insect, over the fire, abhors you and is dreadfully provoked; ..." Dr. Sproul uses this passage to emphasize that God is provoked by our sins, and that it is God's grace that keeps us from immediately dieing and going to eternal punishment. It is unclear to me whether Dr. Sproul believes that God abhors (or hates) either unrepentant, unbelieving sinners or Christians who also sin. And the word hate could have more than one meaning. It could be either the emotion which we most often associate with the word, or it could be the actions that one takes. The killing of Nadab, Abihu, and Uzzah could be referred to as hate, in a certain sense.
The book does not give a succinct presentation of the gospel, repentance, salvation, and reconciliation. It gives much of the gospel in the chapter about Luther and other places, but this would not be the book to learn all about the gospel. There is somewhat of an assumption that the reader already understands that Jesus suffered for our sins and that if we trust in Him and repent, we will be forgiven by God.
I recommend The Holiness of God because it addresses, very well, some aspects of God that are often neglected or even rejected today.
Get more detail about The Holiness of God.