The Essential Guide to Prayer by Dutch Sheets is a how to book on how to pray to gain a better relationship with God. This book is a good read. It uses stories from his own life to relate, and really insists on how important persistence is. Prayer needs to become a habitual practice in your life.
At the end of each section the author asks questions for you to reflect upon to gain a better understanding of your prayer life. I really liked the real life examples, and how he tied in Bible verses throughout the book. Overall a great read.