The 3-rd book of the Paradox trilogy by the German Sci-Fi author Phillip P. Peterson appeared in February 2019. It covers multiple ideas, which you can also find in my story, starting with a body-less existence of individuals in an advanced civilization, going through to a mental fusion of all individuals in the universe to one intelligent entity, up to a huge, actively-invoked time-loop, where the end of the universe is equal to its beginning. Phillip P. Peterson is a highly readable author and I definitely recommend all his books, not only the Paradox trilogy.