This novella brings together many of the characters who appear in the other books (although, not all since Pip hasn't met some of them yet). They gather one night to participate in a role playing murder mystery set in the 1920s. There are moments of suspense, but mostly it is all fun and games (literally) as the clues are revealed and everyone tries to stay in character. Only Pip gets so into finding the fictitious murder.
If you have read the other books in the series, you should pick this one up and enjoy it.
For more info, check out the Indianapolis Public Library catalog.