Book Reveiw- "Is That Really You, God?"

My dear friend who is also a Christian, really liked this book and suggested I read it.  It is the very interesting journey of a man -Loren Cunningham- who loves Christ and follows Him.  He had a vision of waves of youth going out to do missionary work and bringing the gospel to people in all parts of the world.  He learns through trial and error how to listen to the Lord and follow the Lord, bringing the praise and glory to Him and not being focused on the tools He gives to accomplish our missions.

He started the group YWAM, which stands for Youth With A Mission.  It was interesting to see the way Loren was led to start schools and ministries in different parts of the world, and even to buy a mercy ship to take relief items to those in need.
In the back of the book, he outlines the Twelve Points to remember:  Hearing the Voice of God.
I like the way he talks about being careful not to be deceived by the enemy, waiting on God to answer in His own time and way, using the Wise Man Principle , where God confirms things with 2 or more witnesses, being aware of counterfeits and at times expect opposition.

We all have a unique calling, or ministry from God, and we need to be humble and prayerful in asking and listening to the Lord to learn what His will is for us.

I really like that he wanted his ministries to be non-denominational.  I believe that as Christians, we ARE all the same team, and we need to band together to fight back the evils of the day.   We are here to share the good news of Jesus Christ with everyone in the world.  We don't have time or energy to be nit-picking each other, we need to look at what we have in common, the teachings of our Lord and Savior, Jesus Christ, and go forward with faith to help and teach others the gospel.  I liked the way Loren insisted on his ministries being non-denominational, so that all who wanted to serve could participate.
There was one word in there that I didn't really understand what it meant in the given context:  release.  And then I heard it again on the Duggar show last night.  Can anyone tell me what it means in a religious aspect?