I have heard many people talk about books they read that helped them with their prayer life. Most are out of print.

So what book" in print"  help you in your prayer life ?

The Bible has been the best book to help me in my prayer life.  Reading God's word helps my prayer life focus on God.  Another way is to pray his attributes starting at A, it can be very simple as God you are Absolutely Holy, God is beautiful.   

R A Torrey is one of my favorite authors on prayer. Some of his stuff is a little hard to understand but very good. I think they have done reprints on a lot of his books so they should be easy to get. His books include How to Pray, The Power of Prayer, etc. 

I do read my Bible just not enough I think. I love my prayers and have heard diffrent people pray. I know I need to spend more time with Jesus  :)

Thanks for the books titles  Charity.

I would have to say Stormie Omartian has written several books on the subject like "THE POWER OF A PRAYING WOMAN"

also Joyce Meyer has several too. Two that come to mind are:

THE POWER OF SIMPLE PRAYER

THE JOY OF BELIEVING IN PRAYER.

All very good.