From the author:
Hello, I am Ha-young Cho.
I'm writing a book in Korean language at the moment, but I've got a chance to translate and soon publish it here in English with the help of my Russian best friend. She is going to introduce herself below.
So, I, Ha-young Cho, am the author, and Yana Rossoshanskaya, my best friend, is the translator and editor.
Thank you!

From the translator:
Hello there!
As Ha-young has already mentioned, I am Yana Rossoshanskaya - a Russian who volunteered to help her best friend in spreading her upcoming masterpiece in writing. I haven't added anything of my own to the novel but only translated it, so it is a 100% her pure work.
The plot twists would whirl and tangle your mind up, but I promise the outcomes are satisfyingly shocking and worth all the tension. Just dive into The Unknown and enjoy the suspense!
Thank you!