A Complete Grammar of Esperanto by Kellerman
http://www.archive.org/details/acompletegrammar07787gut Esperanto in Fifty Lessons by Privat
http://www.archive.org/details/esperant ... 00privgoog Esperanto at a glance, the international language; history, grammar, and vocabulary ([c1908]) by Edmond Privat
http://www.archive.org/details/esperant ... 00privrich Karlo – Facila Legolibro por la lernado de Esperanto by Edmond Privat (1910)
http://manybooks.net/titles/private2452524525.htmlVivo de Zamenhof by Edmond Privat (1920)
http://manybooks.net/titles/private2635926359.html Esperanto in Twenty Lessons by Griffin
http://www.archive.org/details/esperant ... 00grifgoog The Standard Course of Esperanto by Bullen
http://www.archive.org/details/standard ... 00zamegoog A first reader : intended for those who are beginning the study of Esperanto (c[1907?]) by Lawrence
http://www.archive.org/details/firstrea ... 00lawriala Practical and theoretical Esperanto; a handy textbook for beginners and advanced students (1906) by Talmay
http://www.archive.org/details/practica ... 00talmgoog Esperanta sintakso by Paul Fruictier
http://www.archive.org/details/esperant ... 00fruigoog Fundamento de Esperanto, gramatiko, ekzercaro, universala vortaro ... (1905) by L. L. Zamenhof
http://www.archive.org/details/fundamen ... 00zamegoog Dua Libro de l’ Lingvo Internacia by L. L. Zamenhof
http://www.gutenberg.org/etext/20006 Fundamenta Krestomatio by L. L. Zamenhof
http://www.gutenberg.org/etext/8224 https://forum.librivox.org/viewtopic.php?f=1&t=21482