This is a good read. An excellent book. Finney was profoundly used by God during the 18th century. He was the key leader in the Second Great Awakening in the United States and has been rightly called "The Father of Modern Revivalism". This book reveals the 'secret' (which is no secret really - nothing new) to Finney's power as a preacher and revivalist. Sadly, too often today the key to effective ministry is seen in sound theological study. Finney would agree that there is a need for in-depth theological study but he adds, and this is the focus of the book, there is also the need to receive divine 'power from on high' which is itself a gift of grace.
The only negative negative comment I would make is that at times Finney sounds like he believes in perfectionism, that is, it is possible to live a life without sin. Some have zeroed in on this and accused Finney of preaching salvation by works - that is not what he said or believed. He did live at a time where he saw nominalism in the church as a real problem - like the book of James, Finney preached that a faith without works is no faith at all. Knowing the historical context of Finney's preaching goes a long way in understanding his theology.
To the critics of this book I would say, remember that you are not reading Scripture here. It is easy to find fault in any Christian author if we look hard enough. Look for the gems, there are plenty of them in Finney and follow the old saying - "swallow the meat and spit out the bones". There is much meat for the discerning reader in 'Power from on High'.
A good read.
Steve.