Is there a page on Leanpub where potential customers can see all my published books and courses?

Yes! People can see all your published books on your profile page.

If you are a Leanpub author, you will see a link to your profile page at the top here:

https://leanpub.com/user_dashboard/settings

You can edit your username and profile information on the page above, as well as find the link to your profile.

If you're not seeing all of your published books on your profile page, this should help:

http://help.leanpub.com/en/articles/3283142-my-published-book-is-not-showing-up-in-my-author-page-did-i-miss-a-setting-to-include-it