It's most likely that you have "Messages" specified in the UnicastBusConfig (maybe left over from copying the config from one of the samples).
I'm not exactly what the issue is, HOWEVER, you must make sure that your Message Types are in a separate assembly, and that your Message classes Implement the NServiceBus IMessage Interface. Also, both your Pub and Sub need to reference your Messages assembly (which you can call anything obviously, you don't have to call it Messages).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.