As was posted in baka-tsuki forum,
If you added Volume 4A and 4B to that (+1406 pages), it will top Index (excluding New Testament and Railgun series).
And I just got my copies today from kinokuniya. p/
Once Book 2 arrive next week, I can resume reading. I could read from the scans but reading them in the monitor just feels weird to me.
---
From Book 1 part 2