FF Bruce was a tremendously influential evangelical theologian/author of the mid/late 20th century. I'd recommend picking up any commentary or book he wrote and I would wholeheartedly recommend this as a great first read.
Prior to reading this book, I understood the Bible as simply always sorta being around and never really thought about questions of how and why. This is a fantastic primer on canon issues and a great historical background to the formation of the New Testament - answering the question of how did they go from being 27 separate books to a collective whole and why we view these as authoritative and not others. For those unfamiliar with these issues, as well as for those seeking to understand some of the important thinkers and events in the early post-NT church, this book is for you.
This book is a critical examination of how our "Bible" came to be accepted. Bruce takes an historical look at the councils and synods that met and the various criteria used to canonize various books of the Bible. This book is useful for scholars who are interested in looking at the origins of the current Bible, but does not address some of the more practical arguments raised by skeptics. A great book overall!