* You recently purchased them: You might have bought new books from the Kobo store, either directly through your Kobo device or on their website.
* You borrowed them: If you're subscribed to a Kobo Plus or similar service, you may have borrowed new titles to read.
* You received them as a gift: Someone might have gifted you a book on Kobo.
* You downloaded them from another source: You might have downloaded books from a library or other source and transferred them to your Kobo.
* They were automatically added: Some Kobo services automatically add new books based on your reading preferences or your purchase history.
To see the exact reason why a particular book is in your library, you can check the "Details" or "Information" section of the book on your Kobo device or in the Kobo app.