What is the theme in The Beekeeper's Apprentice, or, on the Segregation of the Queen by Laurie R. King?

Acting and risk are themes in the book. Holmes comes to the conclusion that the only way to catch their opponent is to set up a ruse that traps her by her own confidence. They must appear to have dissolved their friendship completely, and when their quarry believes it completely she will reveal herself. Holmes will use himself as bait, and when the time is right, Russell is to swoop in and rescue him. The plan is a good one, and if executed correctly, will work flawlessly. They begin the ruse aboard ship, presuming that they are being watched at every turn.