Originally Posted by ChrisKaos
About a thousand, which is why this application would be incredibly useful. Even with collections sorted under authors, I still have 165, over 21 pages.
A thousand books is rather excessive for modern kindles that keep their collections database on the 30MB /var/local that has other stuff stored there too. One method some people have used to avoid that problem is to move it to the much larger /mnt/us and put a symlink in its place.