Not good enough, we need wider coverage on more topics, arranged in the order of necessity (basic foundational knowledge first) and progression (books that explains the past comes before the books of the present), with the exception where foundational knowledge that describe past and present together, should be prioritized over the more detailed knowledge of the past.
Also we need to consider cross-discipline and cross-topic books, in those case books that explains the "big picture" should be prioritized over books that only focus on a smaller sub-topic or event.
Any progress?