On August 21, 2020, A. M. Best Company published The AM Best Business Trilogy. The company sent me a review copy consisting of three hardback books.
One book, entitled The Man, is a 275-page (including end notes and index) biography of Alfred M. Best. Another book, entitled The Company, is a 581-page (including end notes and index) history of A. M. Best Company. The third book, entitled The Industry, is an 815-page (including end notes and index) history of the credit rating agencies.
The Trilogy is an impressive piece of work. It is available for $75 from A. M. Best Company or from Amazon.