This week, an issue was flagged that Tome of Knowledge Sharing in Thaumic Tinkerer can soft lock a New Player who reads a book of an experienced Thaumaturge.
This is a bug. We take all game-breaking bugs that can lock players out of enjoying the Mod, seriously. We are working hard to deploy a patch that fixes this issue, and we will get the patch released before the end of the month.
If you experience any other bugs in Thaumic Tinkerer, please flag them to us on the GitHub Issues page.