Having previously read and loved Tozer's "The Attributes of God" (Volumes 1 & 2), I hoped for similar writing in this book - and joyfully received it. What I love about this author's writing is that he takes emotional concepts and explains them with reason so we can trust their validity even more, and takes abstract concepts and conveys them in a way that makes sense in the real world.
The major themes of this book are wonderful, timeless, and important: Living in constant communication with God every second of the day, and holy living as a natural response to Him instead of an effort.
This book is about half the length of what I would consider a "normal" book, but it is definitely worth your money and will still take you a while to get through, since I find it best to read one chapter and then mull over it for a day or two (since there is so much content packed into so little space, and demands contemplation). Using it this way, reading each of its ten chapters as a longer-than-usual daily devotional will take you on a trip of experiencing God in new ways.