Digital library
Textbooks, references and open learning resources.

External
British Literature Through History
LibreTexts · LibreTexts
British literature is literature from the United Kingdom of Great Britain and Northern Ireland, the Isle of Man, and the Channel Islands. Anglo-Saxon (Old English) literature is included, and there is some discussion of Latin and Anglo-Norman literature, where literature in these languages relate to the early development of the English language and literature.

External
Introductory Chinese Grammar I
All Set Learning · LibreTexts
LibreTexts

External
ESL Grammar The Way You Like It
Don Bissonnette · South Seattle Community College
These books were created by Don Bissonnette for students and teachers of English as a Second Language (ESL). I taught ESL and EFL for 45 years and wanted to provide books and resource material for FREE to anyone who might want or need formal English. In these books, which were based on grammar, one can also find vocabulary, some pronunciation, punctuation, capitalization, and model paragraphs.

External
Introductory Chinese Grammar II
All Set Learning · LibreTexts
LibreTexts

External
Seven Sketches in Compositionality: An Invitation to Applied Category Theory
Brendan Fong & David I. Spivak · Massachusetts Institute of Technology
In the contents: 6.01: The ubiquity of network languages · 07: Logic of Behavior - Sheaves Toposes Languages

External
Reading, Writing, Research, and Reasoning: An Advanced ESL Text
Gabriel Winer & Elizabeth Wadell · Berkeley City College & Laney College
In the contents: 4.02: Sample Student Research Essay- Heritage Languages