This list truly could serve as a lifetime TBR of the classics, both fiction and non-fiction. And, bucking recent trends, it has more than 10 books on it!
The original instructions to Goodreads users were: 'This is a list, which allows you to vote for the books that you consider as some of "the great classics" but, unfortunately, have never gotten a chance to read.' So it's no surprise that massive tomes have risen to the top of the list.
In contrast, to avoid chaos, my challenge involves checking off works you HAVE READ.
Notes: This list duplicates almost every book on the source list, some of them quite obscure. Inexplicably, this has led to a modest Polish accent/bias in the later works, but I have retained this since I have some Polish ethnic background.