The ECK books are simply to show people how to go inside themselves, into the pureness of their heart, where they can get answers directly from the Inner Master about things of a spiritual nature, insights to help them in their life.
Most people who desire God look for the God state too far from home, but the seed of spiritual greatness is in the heart of all. The spiritual exercises help one find a comfortable relationship with the Eck, the Holy Spirit - and with all life.