I just finished the +50 pages preview and I really enjoyed it!
Biggest shock: Robin is dating Ryan Murphy!!!! (for 8 months already!!!!!)
Favourite quote: "So here stood Cormoran Strike, [...], thinking about not thinking about Robin Ellacott"
Also, I really liked how the case was introduced. The fact that, this time, they have to save someone adds a lot to the case. I think it's a complete contrast to Troubled Blood (which I also enjoyed).