Theoretical physicist Rainer Sachs from the University of California, Berkeley, observed that The Large-Scale Structure of Space-Time was published within just a few years as Gravitation and Cosmology by Steven Weinberg and Gravitation by Charles Misner, Kip Thorne, and John Archibald Wheeler. He believed these three books can supplement each other and lead students to the forefront of research. Whereas Hawking and Ellis employ global analysis extensively but say relatively little about perturbative methods, the other two books neglect global analysis and cover in great detail perturbations.