As textbooks in the Course Reserves room at the library are inaccessible due to Covid-19, check out potential open textbooks to be adopted for your courses in OER by Discipline Resource Guide : Concordia University.
Open Educational Resources
Open Educational Resources (OER) are teaching, learning, and research materials in any medium that permit no-cost access, use, adaptation, and/or redistribution by others. They include textbooks, curricula, syllabi, lecture notes, question banks, videos, audio, simulations, assessments, etc.
Adapted from "Open Education: Content" (EDUCAUSE)