It is exactly what it purports to be: an anthology of the best post-Reformation works on the various loci of theology. Each chapter is about 2 1/2 pages and has Beeke’s running commentary on the best (and sometimes those to be avoided).
It’s not a criticism but an observation: the literature on church-state relations per Augustine can’t be complete without a discussion of R. A. Markus and Oliver O’Donovan.
Reading anthologies and commentaries on commentaries is actually quite fun. This volume is highly recommended.