If you prefer supporting independent bookstores, check if they offer digital versions through their affiliate partners. Borrowing for Free (Legally)
Both platforms offer the EPUB version, which is stored in your cloud library for easy access across mobile devices.
You can purchase the ebook on Amazon. While Kindle uses its own format (AZW3/KFX), you can read it on any device using the free Kindle app.
Most public libraries offer Wishtress as an ebook. You just need a valid library card to "check out" the EPUB file to your phone, tablet, or e-reader.