Originally Posted by Elfwreck
Quick note: going through searching by titles for each letter of the alphabet (7404 "A" books, 4565 "B" books, etc.) gets a total of 87,867 ebooks. Which is rather a bit short of 750,000, even if they count multiple filetypes as multiple books. I rather imagine they don't offer 9+ filetypes for each.
Did you perform a search on 0-9 as well?