Paperback, 196mm x 127mm , xvii prelims, 256pp. plus index, Good +/NoWrapper. Paperback has been handled, spine creased, light wear to block edges, else clean and tight. Paperback edition of Davies' popular 1984 summary of research into cosmological theory which seeks to unify all universal forces including gravity, revised with new material for this edition.. Catalogue: Science. Keywords: quantum, gravity, particle, physics