This book kept me on the edge of my seat. If I were a nail bitter I'd have nubs. I like the fact that ending is not what you'd expect. I tried throughout and was happily surprised.
I haven't read it, but I loved the audio version.
The author threw so many twists and turns that I could not figure out who the killed the Man in 3B.
The narrators made this book come alive, I could see each of the characters vividly.