Here is some text online that anyone can read or use to study. The Books with Previews section are selections I found on Google that have scanned previews of the book. The whole book isn’t available online, but I would strongly encourage that you purchase the book if you are using it extensively. Enjoy.
UNM Digital Library
About 60 different Navajo Language Readers available for download.
Dine College Multimedia Library
Audio, text, pictures, and glossaries available throughout 7 different reading levels.
I found out there is a Navajo Wikipedia page!! And there is tons of content. Well, it looks like a lot. Go check it out.
Talk in Navajo
Website with Navajo phrases
Countryboy79’s Navajo Site
Navajo translations of English text, some with audio
The Navaho Language
The elements of Navaho grammar with a dictionary in two parts containing basic vocabularies of Navaho and English.
Dine Bizad – Navajo, his language: a handbook for beginners in the study of the Navaho language(1910)
Conjugated verbs, with index.
Navajo Grammar by Gladys A.Reichard
Learning Navaho, by Berard Haile–Vol1 & 2
A Vocabulary of Colloquial Navaho by Robert W. Young
A Stem Vocabulary of the Navaho Language
A Vocabulary of the Navaho Language
Volumes 1-2, by Franciscans, St. Micheals, Arizona
Talking Navajo Before You Know It
Navajo Phrase book
Navajo Rosaries Prayers
Text in Navajo available to read
Reading in Navajo booklet
Quick guide to read in Navajo
Navajo Linguistics Archive Project–Ken Hale Archive
Collection of materials that Professor Ken Hale bequeathed to the Navajo Language Academy, Inc. Includes the following and more…
Little Herder in Winter
Bilingual children’s book, PDF file. ~100 pages.
Our Community, Today and Yesterday
A bilingual social studies textbook book.
An Ethnological Dictionary of the Navaho Language (1910)
Dictionary developed by Franciscan Fathers in St. Micheals, Arizona.
Another scanned copy available here.
A key to the Navaho orthography employed by the Franciscan fathers. The numerals “two” and “three” in certain Indian languages of the Southwest (1911)
A follow-up resource to the Ethnological Dictionary
Selections from the Old and New Testament
Mozes bi naltsos alsedihigi Godesziz holyehigi inda yistainilli ba Hani Mark naltsos ye yiki-iscinigi (1910)
Parts of Genesis and Mark of the Bible
Navaho myths, prayers and songs (1907)
Navajo and English translation of some myths, prayers and songs.
The Flag of My Country. Shikéyah Bidah Na’at’a’í by Cecil S. King
Short bilingual story.
eBOOKS WTH PREVIEWS
The Navajo verb: a grammar for students and scholars By Leonard M. Faltz
Highly recommended. Author starts small and builds up to the complexities of Navajo verbs.