Alex Ross' book Wagnerism is out and I will, of course, read it ... if not perhaps at a speedy pace. :)

Fifty years after the initial publication of the first book in his trilogy, Francis Schaeffer's legacy of attempting to grapple with cultural change in the West arguably fell short of contending with the scope of what happened in the long nineteenth century for the simple reason that he never once dealt with the legacy of Richard Wagner and to not deal with the legacy of Richard Wagner is, perhaps even more than with Beethoven, to not really deal with the scale of Wagner's influence in Western European art and thought since his death.

So ... if you want to take a long but not-so-long-as-could-be trek through Wagner and his legacy Alex Ross' new book Wagnerism "might" be the book for you.

And a few reviews, because sometimes you can pick up things from reviews that help you decide whether you want to read the book to begin with.  I made that decision as soon as Ross mentioned he was writing the book but your experience may vary so ...
https://newrepublic.com/article/159260/fateful-harmonies
https://lareviewofbooks.org/article/the-gigantor-of-art/
https://www.artsjournal.com/uq/2020/09/on-wagnerism-by-alex-ross.html