Warszawa: 1897. — 42 s.
W książce Zamenhof przedstawił 16 podstawowych zasad Esperanta i dostarczył słownika.
L.L. Zamenhof (15 December 1859 – 14 April 1917) was an ophthalmologist who lived for most of his life in Warsaw. He is best known as the creator of Esperanto, the most widely used constructed international auxiliary language.