The blurb for says:
Are you an overcomer? Or, are you plagued by little sins that easily beset you? Even worse, are you failing in your Christian walk, but refuse to admit and address it? No Christian can afford to dismiss the call to be an overcomer. The earthly cost is minor; the eternal reward is beyond measure.This book is very straight-talking. Moody pulls no punches when talking about sin and how it affects us. He does use humour and anecdotes to explain and help convey his meaning, so though it is a blunt book, it didn't feel like he was being accusatory or holier-than-thou.
Dwight L. Moody is a master at unearthing what ails us. He uses stories and humor to bring to light the essential principles of successful Christian living. Each aspect of overcoming is looked at from a practical and understandable angle. The solution Moody presents for our problems is not religion, rules, or other outward corrections. Instead, he takes us to the heart of the matter and prescribes biblical, God-given remedies for every Christian's life. Get ready to embrace genuine victory for today, and joy for eternity.
Being written in the 19th Century, it is written in old English, and all Bible references are from the King James Version, so though it is updated, the language isn't. The other thing that stood out to me, was Moody's damnation of alcohol, and drinking at all. I'm guessing that is part of the social context, as reading about prohibition on wiki, there was a societal movement against alcohol before prohibition became law in the early 20th century. As a Christian who does drink alcohol, I don't agree that we need to abstain entirely, but if it is a problem to you as an individual, then it is certainly wise to not drink.
Overall, though, I'm glad I read the book, and am more inclined to read other books by Moody, or other evangelists of the time (eg Spurgeon).