The author of Everyday Instructional Design: A Practical Resource for Educators and Instructional Designers would like to acknowledge Tim Slade of timslade.com. The cover art for this volume was adapted from his royalty-free 60+ Free Images for eLearning collection, which can be found on his 250+ Free Stock Photos for eLearning blog post.
Slade, Tim (2017, February 26). 250+ Free Stock Photos for eLearning. Timslade.com. https://timslade.com/blog/stock-photos-for-elearning/