Quantum gravitation

Offers a self-contained, yet comprehensive, introduction to quantum gravitation based on the traditional, well tested covariant approach that forms the basis for a modern treatment of gauge theories Stresses the basic physical ideas, and developing simple examples and exploiting analogies where suitable Avoids so-called loop gravity and spin foam models, which break general covariance explicitly and provide no insight on how and why it should be restored Includes supplementary material: sn. pub/extras