Arthur Pink 
A Guide to Fervent Prayer [EPUB ebook] 

Much has been written on what is usually called ‘the Lord’s Prayer’ (which I prefer to term ‘the Family Prayer’) and much upon the high priestly prayer of Christ in John 17, but very little upon the prayers of the apostles.
Personally I know of no book devoted to the apostolic prayers, and except for a booklet on the two prayers of Ephesians 1 and 3 have been scarcely any separate exposition of them. It is not easy to explain this omission.
This book brings together a great biblical study on prayer based on the Holy Bible and will serve as an inspiration for you who want to know more about prayer.