This book sets up a discrete universe with minimum and maximum dimensions. Singularity is rejected.Entropic Spacetime Theory divides the universe into a kinetic system and an entropic spacetime. The kinetic system is what our present physics is all about; it deals with radiation (vector bosons) and mass particles (fermions). Relativity and quantum mechanics deal almost entirely in the kinetic system.The entropic spacetime (EST) defines space; in this theory there is no vacuum — EST is space. Made up of energy and dipole charges, its values can be converted into length and time.The theory offers a new description of space, a new cosmology, names space as the original creator of all new matter and radiation.