Use the toolbar button or the context menu to compare new & used books prices at multiple online stores including amazon, ebay.
If you do not see the button in toolbar, go to browser menu View -> Toolbars -> Customize, and drag the Bookuet icon button to toolbar.
Highlight ISBN, Title or Author Name.
Then click on the button or right click.to select "Compare Prices at Bookuet".
Or, just click on the button and enter ISBN, Title, Author.
You can also click on the button and press "OK" without entering anything in the prompt box to go to http://www.bookuet.com