I actually did your Dewey Decimal project: https://www.dahosek.com/category/dewey-decimal-project/ I read one book out of each “decade” of the Dewey catalog from my local library (which is reasonably well stocked). It was a bit less than the predicted 100 books since there are some gaps in both the system and the collection of my library, but it was an interesting way to discover things I didn’t know I didn’t know.