Murder Mystery Night - Sour Grapes

"Who killed Elizabeth Killingworth?... The six guests sit around the massive oak table in the kitchen of the Killingworth Wine Estate are throwing accusing glance at each other. Gathering clues and talking to each other... Will they solve the mystery of tonight?... One of them is the murderer..."

We are trying a slightly new twist on the murder mystery party formula. Each player are receiving a notebook with the information of the character before the night so that they can study and prepare the party at their convenience. Each player have secrets in their notebooks, information they don't want to share. But they also have clues which used on the right person, force them to reveal their secret.
We already did 3 run of the first prototype, every time tightening the plot, making the system more understandable and accessible. 
So far we have been receiving some pretty positive reviews! Next objective is to create a storyline that fit better our new system.