As of now, the below bookstores are available in the Aldiko Book Reader:
2. All Romance Ebooks
3. O'Reilly Media
8. Beam Ebooks
We are working hard to continue add more stores and content in the Aldiko Book Reader. If the bookstores that you love are currently not our content partners and you would love them to be one of the default stores in the Aldiko Book Reader, please tell the bookstore to join our Retail Solution: http://www.aldiko.com/partners.html
Also, you can also add other bookstores' catalogs in the app so that you can access books from these catalogs right inside the app.