Here's what he said:
I finished reading of the novel just a couple of days ago. The most striking impression for me, being St.Petersburg native, is a strong Russian, St.Petersburg feel of it. Although written in English and by an Englishman, it reads as a naturally Russian literary work, and it's quite an accomplishment. I haven't experienced that feeling before, although I read quite a few Western novels with Russian
It's a great work of the detective genre, it truly keeps you thrilled and guessing until the very end. My mom loves detective stories, and I told her she would enjoy it when it's available in Russian.