I read this book about 5-Jan-2014. This is the first time I've read this book. The book is copyright 1969. This note was last modified Sunday, 12-Jan-2014 10:37:25 PST.
This note contains spoilers for the book.
This would be non-fiction, if Nero Wolfe and Archie were real. I've flagged it for spoilers.
The author was a prominent Holmesian, and in fact did the annotations for that universe. The copyright suggests it was published posthumously.
There's discussion of recipes, and a chronology of cases (including those not reported by Archie, but just referred to), and some information about orchids, and a map of the first floor of the house, and a discussion of the various addresses it has been at over the years.
Then there's some genealogy, attempting to establish that Wolfe is in fact the son of Sherlock Holmes and Irene Adler. If it were clearer that they were uncovering something the author intended to be there to find, I would find it more interesting. As it is, the most interesting bit to me is that the main work on that was done by John D. Clark the rocket fuel expert (and author of the hard-to-find Ignition!: An Informal History of Liquid Rocket Propellants).