he was such a versatile writer! I think it's so cool that he did a little bit of everything, from adventure stories to pot-boilers, to children's stories to music essays

Oh yeah, it certainly seems like it! And that fake cartomancy (?) book... well, even if there's a lot lost to history it sounds like there's still plenty to explore :D

did you read the one that's included in the appendix?

Not yet, although I read some of the bits from the introduction about it, and it does sound good (and sad)—I'm saving it for another time!