Dr. Kay and Dr. Hunter, supported by eCampus Ontario and Ontario Tech University (UOIT), believe that education should be readily available to everyone, which means supporting the creation of accessible, open, and free educational resources. Wherever possible, the Thriving Online open textbook adheres to levels A and AA of the Web Content Accessibility Guidelines (WCAG 2.0, 2.1) of perceivable, operable, understandable, robust, and conformance (https://www.w3.org/TR/WCAG21/). Pressbooks was chosen for its commitment to built-in accessibility, outlined at https://pressbooks.org/accessibility/. Further, we completed Coolridge et al.’s (2018) Checklist for accessibility during the final editing phase of book construction (available upon request).