The OP introduces us to Robert Sungenis' book The Geocentric Universe -- According to the Visions of St. Hildegard of Bingen (1098 - 1179).  This work was published in 2014.  Some may be interested in making note of another work by Sungenis published two years later in 2016.  It is A Googolplex of Tiny Blackholes: A Theory of the Cause of Gravity, Inertia, & the Speed of Light.  The description of the book as seen on Amazon is as follows:

 

For centuries scientists have been trying to find the physical cause of gravity, but to no avail. Newton, for all his scientific prowess, could only tell us how fast the apple fell to Earth, but he had little clue why it fell. Likewise, Einstein merely gave us a mathematical model of gravity (i.e., 'a warping of spacetime' ), but he could never explain what precisely space is or how it could warp. Others like Berkeley, LeSage, and Lorentz also gave us theories, but none were able to answer all that gravity requires to be explained. Borrowing from a concept that St. Hildegard of Bingen described in her many inspired visions of the world, Robert Sungenis has applied her insights to what we know from modern science, particularly quantum mechanics, and has theorized the physical cause of not only gravity, but the equally puzzling phenomenon of inertia; as well as telling us why the speed of light is sometimes c, and why it can exceed c. In the end, this theory of gravity, inertia and light helps us fully understand the account of creation in Genesis 1 in the light of modern science.

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That's a high bar, my friend.

Indeed, it certainly is!