Established at the University of Minnesota, the Open Textbook Library, is "a comprehensive resource for openly licensed academic textbooks. All textbooks are free, and the majority are peer reviewed."
Started by UC Davis, LibreTexts lessens the burden of student costs by providing open access texts kept up-to-date by students, faculty, and outside experts.
Springer Nature publishes open access books across a wide range of areas in science, technology, medicine (STM), and humanities and social sciences (HSS).
Examples of Economics Related eBooks from the Ebsco eBook Collection