Great question — yes, you can usually buy 'Checked' online as both a paperback and an ebook, but the details depend on where it's published and who distributes it.
I've bought books this way a dozen times: first I search by title and author on a big retailer like Amazon, Barnes & Noble, Kobo, or Bookshop.org. Amazon will often offer a paperback (or print-on-demand paperback) alongside a Kindle ebook. Barnes & Noble shows paperback and a Nook ebook,
kobo covers epub for many regions, and Apple Books/Google Play might have the ebook even if other stores don't. If 'Checked' is self-published, the author or small press might sell a signed paperback on their own site while distributing the ebook through aggregators.
A few practical tips from my experience: check the ISBN to ensure you're buying the exact edition you want, look at delivery times for paperbacks (print-on-demand can be slower), and note DRM — Kindle files are locked to Amazon devices/apps unless the publisher offers a DRM-free EPUB. If you prefer transferring files to
e-readers, EPUBs are easier for non-Kindle devices; for Kindle you either buy the Kindle version or use Calibre to manage formats where allowed. Also consider audiobook options or bundle deals — sometimes authors or stores sell paperback+ebook bundles, or the publisher has pre-order packages. I usually pick the ebook for instant reads and grab the paperback later for the shelf; both keep different kinds of joy, honestly.