Quote Originally Posted by Raldo View Post
Tier 1: +50% xp, 5k maximum bonus (15k total xp)
Tier1 books are +50%, 4k bonus. This kills the effect at 12,000 XP. They are not 5k, I and many others have noted this on the forums back when they came out.

by that logic, tier2 books would be 8k bonus, or kill off at 24,000 XP.