Hi there! I understand you've noticed books in your Libby app that were borrowed or reserved, but you didn't do those actions yourself. Let's try to get to the bottom of this together.

To start, could you let me know if you share your Libby account or device with anyone else? Sometimes, multiple users on one device can cause unexpected loans or reservations. Also, have you noticed if this happens immediately after you receive notifications from Libby, like holds becoming available? Libby sometimes auto-borrows holds if not managed in time.

Meanwhile, here’s what you can do step-by-step to address this:

1. Review Your Loans and Holds:
- Open Libby on your iPhone (iOS 18.6).
- Tap the "Shelf" icon at the bottom.
- Check both "Loans" and "Holds" tabs carefully to identify which titles you did not borrow or reserve.

2. Returning Accidental Loans:
- For any loaned book you did not borrow, tap "Manage Loan" next to the title in your Shelf.
- Select "Return Early" to give it back and remove it from your account.

3. Cancelling Holds:
- Similarly, for holds (reserved books) you did not place, tap "Manage Hold" or swipe the hold, then tap "Cancel Hold" to remove it.

4. Change Your Account Password:
- To ensure your account isn't accessed by others, it's a good idea to update your library account password, especially if you use the same login credentials elsewhere.

5. Verify Notifications Settings:
- Libby sends notifications when your hold is ready, and you have 72 hours to borrow or suspend it.
- Sometimes if you or someone else taps "Borrow" quickly or you interact with notifications by mistake, it can borrow the book.
- You might want to disable or customize Libby notifications in your iPhone settings temporarily to avoid accidental taps.

6. Check for Multiple Devices:
- If you access Libby on other devices, check if those devices have accidental loans or reservations.
- Log out from all devices and log back in on only your main device.

If these steps don’t solve the problem or if you suspect that someone else used your account without permission, please let me know. I can guide you on more advanced troubleshooting or reaching out to your library’s support.

Does this help clarify the situation? Are you able to see and manage those unwanted titles following these instructions?