The Imagined Library Books that were never written

Sherlock Holmes  ·  Mathematical treatise

The Dynamics of an Asteroid

Professor James Moriarty

Can I actually read this? Not really. You are told what it contains, but never shown it. Described

A book of pure mathematics so rarefied, Holmes says, that no man in the scientific press was capable of criticising it — which is the entire review, and the entire threat.

A book whose only reported quality is that it cannot be talked about by the people qualified to talk about it. That is not a plot. That is a calling card.

Doyle needs Moriarty, in a hurry, to be Holmes’s equal. He does not have a chapter to spend on a criminal’s interior. He has a title. The Dynamics of an Asteroid does the work that a later writer would waste on childhood trauma and a wall of equations: it says, this man thinks at an altitude where the rest of the profession cannot even enter a disagreement. The binomial theorem got him the chair. The asteroid is what he did with the chair.

We will never read it, and Holmes has no interest in reading it. The book exists to be cited in a drawing room, once, as you would cite a weapon. Among the thin entries in this library it is one of the ones that should stay thin. Filling it in would be missing the point, which is that some books are more eloquent as a rumour of difficulty than as a difficulty.

On the readability rating. A title, an author, a reputation, and Holmes’s sentence. No extract. The scientific press, as reported, could not have supplied one either.

From the book

Is he not the celebrated author of The Dynamics of an Asteroid, a book which ascends to such rarefied heights of pure mathematics that it is said that there was no man in the scientific press capable of criticising it? Sherlock Holmes, in "The Valley of Fear", 1915

In-world history

Attributed to Moriarty in Holmes's account of the man who has been organising London's crime. A treatise on the binomial theorem is mentioned alongside it as the work that won him a chair. The Dynamics is the one nobody could review. Its contents are never given.

Why it matters

Moriarty is introduced as a mind, not as a criminal, and the book is how Doyle makes the mind visible without writing a lecture. Its unreadability is the characterisation.

Appearances

  • The Final Problem (1893) — Arthur Conan Doyle Holmes cites it as evidence of Moriarty's stature
  • The Valley of Fear (1915) — Arthur Conan Doyle Quoted at slightly greater length, still without a formula

Connected volumes

Catalogue record

Category
Mathematical treatise
World
Sherlock Holmes
Imagined by
Arthur Conan Doyle
First appearance
"The Final Problem", The Strand Magazine, December 1893
Readability
Described

Sources

  • Arthur Conan Doyle, "The Final Problem", The Strand Magazine, December 1893.
  • Arthur Conan Doyle, The Valley of Fear, The Strand Magazine, September 1914 – May 1915.

Added by house · last checked 2026-09-01