[quote=@Alex]
I could try to put some of that into more perspective by figuring out how much area all those rooms take up, or how tall a tower of rooms would be, but honestly at this scale I feel like it'll be so large it wouldn't matter. Suffice it to say: shit's big
[/quote]

If that 29^3200*410 is the number of books, then using the dimensions of Tolkein's Two Towers (word count of 156,198 * 5 -> rough character estimate of 780,990 characters -> /3200 to receive 244 'books' to the Two Towers) of 6.3375e-4 m^3. Dividing this by 244 to receive 2.597e-6 m^3 per book. Therefore 29^3200*410*2.597e-6 = 9.418e4680 m^3. The volume of the Earth is roughly 1.098e21 m^3. So that makes 8.577e4659 Earths to hold the books if the Earth was an empty sphere and every bit of space inside was used to store the books.