Again, I had a hard time putting this book down and am giving it 4.5 stars. The people involved are by now old friends and I really wanted them to succeed in uncovering the crime syndicate tourists! They befriend a whole handful of possible suspects on the cruise, but it's slow going - they all seem equally guilty (or not). Never fear, the mastermind is uncovered - not without a bit of excitement, though! - I received an advance copy and freely leave this honest review.