Why is "The Worlds of J. R. R. Tolkien" trending?

Wikipedia Overview

The Worlds of J. R. R. Tolkien: The Places that Inspired Middle-earth is a 2020 non-fiction book by the journalist and Tolkien scholar John Garth. It describes the places that most likely inspired J. R. R. Tolkien to invent Middle-earth, as portrayed in his fantasy books The Hobbit and The Lord of the Rings. Those places include many that Tolkien lived in or visited in his early life, as well as sites from history and literature. Most are real, for instance with England as the counterpart of the Shire, though some, like Atlantis, are mythical, and others, like Mirkwood, probably have roots in real places. He notes the ambiguities in some of the connections, and that others have made superficial comparisons, such as of Tolkien's towers with various modern towers in Birmingham, where Tolkien lived as a child. Garth presents his theories of the likely origins of some of these places, supporting these with maps and photographs.