I'm halfway through the book club selection and feeling optimistic that I might finish it in time for book club. It's pretty good, altho there are some odd lapses: failure to refer to Wendell Holmes publication on the subject of puepural fever -- I know he was overshadowed by Semmelweis and Lister, but he kinda had precedence and it seemed relevant, all things considered. So far, Morse's position on slavery hasn't gotten much mention -- his Know Nothing positions are given as the reason for his dismal political performance, but I bet his position on slavery was more salient. And Moreau Gottschalk's mother and younger sibs are mentioned as coming to his Paris debut, without any mention that most of those younger sibs were not the children of his mother.
You could argue that these are all kinda minor details that don't matter and, hey, scope, but scope in this book is a pretty nebulous thing anyway.
But it's an interesting read and a great lens to think about the 1830s, '40s, etc.