I have recently updated InDesign and since the upgrade this morning I have had trouble with my book palate. When I open a document by double-clicking on it in the book palate, the document opens however the book palate crashes and vanishes from the workspace. I can only retrieve it by re-booting InDesign.
This makes it extremely awkward exporting books to PDF etc. Before I export, I have to close down and restart the app. It didn't do this before.