Aventurine on the Border

The chase takes them to London, where Burroughs and Aventurine are joined by Micheline's son, Paul, and his partner, Lance. Someone is obviously watching them, however, as the coded clues keep appearing. As they all investigate -- and disagree on the meaning of the clues -- everyone falls away from Aventurine until she finds herself in the North Yorkshire village of Whitby, facing surprising danger -- alone.