[Edit Description]
Click on bookmarklet to easily search amazon.com
You can also select a word on the page you're visiting, click the bookmarklet to search that keyword on amazon.com. Makes searching really easy.
Source (www.amazon.com)
[Edit Javascript]
Show Source Code
javascript%3A%28function%28%29%7Bfunction%20getSearchString%28promptString%29%7Bs%3Dnull%3Bif%28document.selection%26%26document.selection.createRange%29%7Bs%3Ddocument.selection.createRange%28%29.text%3B%7Delse%20if%28document.getSelection%29%7Bs%3Ddocument.getSelection%28%29%3B%7Dif%28%21%28s%26%26s.length%29%29%7Bs%3Dprompt%28promptString%2C%27%27%29%3B%7Dreturn%20s%3B%7DsearchString%3DgetSearchString%28%27Search%20Amazon%3A%27%29%3Bif%28searchString%21%3Dnull%29%7Bif%28searchString.length%29%7Blocation%3D%27http%3A//www.amazon.com/exec/obidos/external-search%3Fmode%3Dblended%26tag%3Dbookmardirect-20%26keyword%3D%27+escape%28searchString%29%3B%7Delse%7Blocation%3D%27http%3A//www.amazon.com/exec/obidos/redirect-home/bookmardirect-20%27%3B%7D%7D%7D%29%28%29%3B
amazon
I found it works best it you highlight the text you want to search.
I wish it searched a few more sites like barnsandnobles.com
