The Saga of the Phoenix volume 3

Space travel through the Gates is now commonplace. A thousand and twenty-four doors scattered throughout the universe allow you to instantly reach planets even millions of light years away. The discovery on New Earth of a Great Gate, which allows you to move in time as well as in space, opens up new horizons for the exploration of the cosmos.
Admiral Gordon and his right-hand man Lucius, with the help of Giorgio Relli, who lives again after a century, inside a bio-cybernetic unit, continue their search for the Incorporeals, the mysterious beings who created the Phoenix on Earth, centuries before. Their goal is to find out what lies behind the last sentences that the Incorporeals have uttered so enigmatically before interrupting all contact with the Terrestrians: "We exist in all time and we are outside of time." Followed by: "The theological hypotheses that you have formulated over the centuries are all wrong and far from the reality of the universe."
The group of scientists led by Dr. Weisman hypothesizes a super-time and sets out in search of this fifth dimension, while Gordon and his friends will go "hunting" for God.