To delete an audiobook first go to the Audiobook Library screen where you can see the list of all the audiobooks.

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Hold down your finger for 3 seconds on the name of the book that you want to delete. This is called an Android “long click” and is similar to doing a right click with your computer mouse. A pop-up menu will appear.

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Select “Delete Book” from the pop-up menu. A confirmation dialog will appear

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Set the check boxes correctly for whether you want to delete the book description and bookmarks from the Ambling BookPlayer audiobook library database and/or delete the audio files from your SD card, and then press the “Confirm” button.