A collection of lists (30s and others) that can be referred to at the table.
What happens? Are you kidding me?
Save/Help the Halflings! They offer rewards. Material and otherwise.
Have you ever been in a position where you needed a quick break but your players were too ancy to break as well?
It looks like a cook's book. It is a cook's book. It is also where the cook, who happened to be a master spy, encoded all his secrets and contacts. The book has innocently fallen into your group's hands. Everyone wants it, and many are not subtle or peaceful in their attempts.