Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Robert Dawson teaches mathematics at Saint Mary’s University, Halifax, Canada. His work has twice appeared in Nature Futures, as well as numerous other publications. His preferred vehicle is a bicycle.
The Librarian rolled slowly through the stacks, its rubber treads making no sound. Its side cameras scanned the spines of the books, 100 call numbers every second. One book — a hardback copy of Murder on the Orient Express, last borrowed five years ago — was upside down and shelved out of order. The Librarian stopped, took the book from the shelf, and replaced it, right-way-up, in its proper location.