The noted Japanese author Haruki Murakami wrote a book called "1Q84" a couple of years ago, which achieved critical and commercial success. An English translation of this book is being issued in 2011.
The book's title is part homage, part wordplay. The title alludes to a classic (English) book, which will also tell you when the events in "1Q84" are set. In Japanese, "Q" sounds the same as a number.
Which English book is being referred to?