I was told by a writing consultant that read it, that it switches genres half way through, and that readers are not going to like that. Basically the first half is sort of a race against time plot to stop a kidnapper/serial killer type. Then halfway through about, the efforts all go wrong, innocent people are hurt, and the MC wants revenge on the villain for the rest of the story and plots revenge. So it goes from a police procedural and espionage genre, in the first half, to a revenge tragedy in the last lalf. But I was told I can pick one for a story, but not have both, cause it's too much of a switch in tone and genre, for readers to accept. Do you think this is true though? I think the genre can be the same, even though the plot takes a new turn. Or is this plot turn, too different, that it actually switches the genre?