R-BOP

So the other day I was sitting in a sherut, when I noticed a book on the dashboard. The title on the spine read, "R-BOP". I kept looking at the book trying to figure out what R-BOP could mean. Is it a new type of music? I looked at the author's name for a clue: Evgenii Suhov. No help. One more time, "R-BOP". One more time, Evgenii. One more time, "Я-ВОР". Ohhhhh. That's a "Я" not an "R". "Я-ВОР" pronounced "YA VOR" means "I am a (the) thief.