Board Thread:Questions and Answers/@comment-72.49.38.12-20130112065941/@comment-76.182.126.96-20130112111639

I'm pretty sure it's due to the fact that enchanted books aren't in the version of Vanilla Minecraft that Tekkit runs on. Tekkit is 1.2.5 IIRC and Enchanted books were added in 12w49a which is after 1.4.5 pre-release.