This book presents a rigorous and systematic investigation into the subject of "Quantum Gravity" from a novel perspective. In addressing fundamental open questions in quantum gravity, we are necessarily — and, it is hoped, successfully — engaged with unresolved problems that span several key domains of physics. We introduce the Photo-Motors (PMs) as the key particles that potentially constitute the matter of vacuum, and probably introduce the concepts of space, mass, force and time in the Universe. The mass itself is directly proportional to the PM's curvature. The PMs are the wanted particles that transmit the gravitational and electromagnetic forces simultaneously. Their radius (mass and energy), at the Planck time, was the Planck length (mass and energy). Moreover, the geometric area of the first PM particle ever created was proportional to the Gravitational Constant "G". Most importantly, arrays of PMs are capable of forming tube-like configurations (resembling thin ropes), in which the constituent PM particles are mutually bound by gravitational forces. This book explores several challenging and unresolved questions, which are examined and potentially addressed, as follows: I. Is PM, in fact, the particle that inseparably unifies the gravitational and electromagnetic forces? II. Is PM the particle through which we can explain the "underline mechanism" in the double slit experiment? III. Are the tubes of PMs transmitting electromagnetic and gravitational waves, simultaneously, with the light velocity? IV. Can the tubes of PMs reproduce the expected deflection angle of 1.75 arcseconds for a light ray grazing the Sun, consistent with General Relativity? V. Is it possible to use the "aberration angle of light" together with the values of the Newtonian force, in conjunction with planetary orbital data to compute the anomalous precession of Mercury's perihelion, as General Relativity does? VI. Are the "de Broglie matter waves" waves of PMs? VII. Are the PMs the hypothetic form of matter called "Dark Matter"? VIII. Can the space-time curve "on its own"? IX. Could PMs be produced by "strings" moving always with velocity c and carrying charge ±e/3? X. Are the tubes of PMs involved in Quantum Entanglement? Etc. Access a list of findings and the full table of contents directly via the following link: https://www.dropbox.com/scl/fi/gkux7nv38kxj4xbeh261g/INTRODUCTION-B.pdf?rlkey=o3smon7tbeqex7xfy0cz29mkp&st=kdr83st6&dl=0