rules. In the dictionary section, he presents a dictionary with 917 roots of vocabulary. Reception and legacy Zamenhof received a wide range of reactions to Unua Libro, from mocking criticism to avid interest. In the hundreds of letters he received, he saw enough support to prompt him to publish Dua Libro in January 1888 and La Esperantisto in 1889, in order to provide more Esperanto reading material for those with interest. In 1889, he also published Russian–Esperanto and German–Esperanto dictionaries to increase Esperanto vocabulary, as well as Aldono al la Dua Libro, a supplement to Dua Libro, to establish the definitive form of the language, a document he promised in part III of Unua Libro. By all measures, Zamenhof's "universal vote" campaign failed. By 1889, he had only reached 1000 signatures, a mere 0.01% of his goal of 10 million. Nevertheless, the Esperanto movement continued onward. Among the early supporters were educated Russian and Polish Jews, Leo Tolstoy and his followers, Eastern European freemasons, and speakers of Volapük who had lost hope in their language. See also History of Esperanto Esperanto Day Footnotes Notes References External links A collection of free Esperanto books compiled by David G. Simpson. This collection includes, among many others, reprints of the "canonical books" of the Esperanto language, i.e., Unua Libro, Dua Libro (with the Aldono al la Dua Libro) and Fundamento de Esperanto. 1887 non-fiction books Esperanto history Esperanto literature Works published under a pseudonym