I feel like I have mentioned this before, but Sayers also totally wrote a Holmes/Wimsey crossover for some BBC radio event thingie. So: TOTALLY CANON. :D

Also, "The Long Halloween" is totally not confusing, as long as you realize that this is one of those plots where you get to make up your own ending and it'll probably make about as much sense as whatever was "supposed" to have happened. So, um. :D