I will consider the different books on prayer that I have and let you know if I think one is particularly good. In the meantime maybe some of the others have suggestions. There are different types of prayer...such as prayers of intercession (which are on the behalf of others), prayers of commitment, and so forth. Mostly though, prayer is simply sharing what is in your heart with God. He want you to talk to Him just as you do a friend. If you are angry, tell Him. If you are happy, tell Him that too. Ask Him things. Let Him know you appreciate Him. Jesus gave us what we call, The Lord's Prayer as a pattern. It starts with acknowledging God as Father and giving him praise. Then we are to remember who He is by acknowledging His Name...."I AM"..He is whatever you are in need of. If you need encouragement, help, wisdom etc., He is able! He is the I AM. (Hallowed by thy name.) Then we pray for His will to be done in our lives, in our friends lives, in our country, in the world etc. Whatever is on your heart. We think about what His will is. For His goodness to be known, for us to know Him better, for people to get healed, for needs to be met..just like in heaven (thy will be done on earth as it is in heaven). We can pray for our needs to be met (give us this day our daily bread). This can be material things we need or spiritual insights and strength. We take time to forgive whoever has done us wrong by recognizing that God has forgiven us and thank Him for His forgiveness (forgive us our debts as we forgive our debtors). We ask for His guidance to keep us from falling into bad circumstances that might pull us away from Him and things like that (lead us not into temptation, but deliver us from evil). And then we again turn our focus onto Him and His ability to answer our prayers, His faithfulness, and on how great He is (the glory and the power is His forever. Amen).

Another fantastic way to pray is to pray the scriptures. Paul wrote some of the prayers he prayed, and they are really good for us to pray them to. They are found in:

Ephesians 1:17-22
Ephesians 3:14-21
Philippians 1:9-11
Colossians 1:9-14
II Thess. 1:11,12

These are really powerful prayers given to us by the Holy Ghost. Make them personal For example:
Ephesians 1:17....Father, please give me a spirit of wisdom and revelation so that I can have greater knowledge of You. Let me know exactly what you have called me to do and help me understand the richness of the glory of what I am called to.

I would encourage you to look them up in your Bible, highlight them, and pray them for yourself and others.

Have a great day!