Short, easy to read and meaty beyond measure. This book is less than 100 pages and so easy to read and get through that I have hardly seen like it. Not to mention that it breaks down so simply prayer - the highest duty of a Christian. If you are not a reader, please pick it up. I have read few books that so concisely describes prayer and make it simple enough to read within a day. Before you notice you’ll be through with it. I will probably re - read for weeks and months and years to come. My favorite book on prayer yet.