While I didn't theologically agree with everything in this book, I did enjoy the principles of prayer that were outlined. This book was originally meant for "Mission India", but the practices and principles are relevant for any believer.
I'd recommend this for anyone who is interested in recharging their prayer life.
So far, I've learned that we can't ask God to bless our endeaveors, if we haven't prayed first. A quote from the book: "God warns me,as Poppa Dykstra warned Andrew, 'Don't ever get on the tractor alone! I want you to be on the tractor, but only when I'm with you!'"