There is a book on the table at the Blue Casket. But it is guarded by three critiques.
This is the low-spoiler guide for "Getting the book from Blue Casket" puzzle in Grim Fandango. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.