About the cover, the yellow used for the title seems slightly strange to me, although I imagine some gold foil effect on the final dust jacket. What I like is the tonality of the background image and the range of colors; I think it gives an interesting sense of solitude...
Regarding the synopsis, I like that this time it's the opportunity to save the victim and not just capture the culprit, which makes it super interesting. I think Robin is going to be busy with that, and we'll see Strike more focused on his emotional (and family) development. We'll see, but it's not long now!