Weller, M. (2020). 25 Years of Ed Tech. Athabasca University Press.
https://www.aupress.ca/books/120290-25-years-of-ed-tech/

This is an open access book that provides a historical critical perspective of a range of technologies and concepts in our field since 1994. Written by someone who has lived the EdTech journey, this could be a basic text for graduate students in educational technology and is a reminder for all technology-in-education enthusiasts. (review by Sanjaya Mishra https://www.linkedin.com/pulse/some-great-books-education-2020-sanjaya-mishra/)