Welcome to MR, Mary!
You may or may not already know this, but if you've a Kobo, then you're not limited to just shopping at the Kobo store.
You can also shop at the Sony Reader store and any other place which sells ePub and PDF ebooks which use the Adobe Digital Editions DRM copy-protection, or no DRM at all. Some of them even offer promotional free books, which you might want to check the Deals, Freebies, and Resources forum for.
And of course there's places like
Project Gutenberg (which even has a
special Canadian annex) that offer free public domain books if you want to read the classics. And of course our very own MobileRead members take the time to hand-format some of them for better display, and you can
browse all their contributions here.
Happy reading!