In the novel "The Rothko Room", it is established that agents may receive information via crossword puzzles.  This puzzle is what's known as a "Pointer", meaning that it contains information regarding a location.  This particular puzzle is a "Treasure Island Pointer", meaning that is meant for a Cleaner - an assassin.

On successful completion of the puzzle, you will be directed to a website, where you will find information that will enable you to view the first three chapters of the book and be entered into a draw.  The first TEN entries drawn from the list of successful codebreakers will receive a free copy of  "The Rothko Room" e-book.

Publication date: August 2013.  Offer ends 31 December 2013.