This was quite a good book.
It's essentially an overview of basic theology. It's well explained and the concepts it contains are actually 'key' so it did a good job of limiting what it covered. It's a good book for young Christians who want to understand their faith more deeply, it lays out a good foundation and gives scripture to back up each of its points. It would also be good for people who are non-Christians to read if they want to understand what Christianity is all about and what Christians think is important. I would recommend it to pretty much anyone, but especially to those who don't know much about Christianity. One of the best aspects of this book is how it explains certain vocabulary words like sanctification, justification, regeneration, etc., words that have a special meaning when used in a religious context as compared to everyday language. This book is really helpful in helping people to understand the language used in Christianity.
I actually read it while working through it with a Japanese learner of English as a way of studying English, so it sparked quite a lot of conversation about the religious register of English and Japanese. The only bad point in this is that sometimes the authors write using rather...unusual...grammar or vocabulary. My personal favorite was 'bounden'. Since it was being used as an English textbook, my friend used 'bounden' in several of her sentences, not bad precisely, but not exactly a commonly extant word. There were several instances of such words, but other than that it was a good book.