It is not a textbook, but rather a compendium of, as the title says, applications of General Relativity (GR) useful for someone who knows the material but wants to look something up, refresh their memory, etc. The breadth of topics covered is thus smaller than in some other books, but the depth is great. it is very specialized, but fills an interesting niche. (Phillip Helbig, The Observatory, Vol. 142 (1291), December, 2022)