Check this out! “The Biblio-Mat is a random book dispenser built by Craig Small (thejuggernaut.ca) for The Monkey’s Paw, an idiosyncratic antiquarian bookshop in Toronto. Biblio-Mat books cost two dollars. When a customer puts coins into it, the Biblio-Mat dramatically whirrs and vibrates as the machine is set in motion.”
Read more about it here.