Google Book Search now offers you an HTML snippet to include on your site. “Expand the universe of information available to your users by including Google Book Search on your site for free. The search box lets users search books of every type and genre directly from your webpages.”

Example:

How to implement: Just copy & paste either of the following code in your site / blog. The first code will look as shown in the example above.

<form method="get" action="http://books.google.com/books">
<table bgcolor="#FFFFFF">
  <tr>
    <td> <img src="http://books.google.com/googlebooks/books_box.gif" alt="Google Book Search" width="108" height="40" border="0" align="absmiddle" / />
    <input type="hidden" name="hl" value="en">
    <input type="hidden" name="sourceid" value="books-referral-partner">
    <input type="text" name="q" size="25" maxlength="255" value="" />
    <input type="submit" name="btnG" value="Search" />
    </td>
  </tr>
</table>
</form>
 

Code 2: Looks as in the below pic.

<form method="get" action="http://books.google.com/books">
<table bgcolor="#FFFFFF">
  <tr>
    <td align="center"> <img src="http://books.google.com/googlebooks/books_box.gif" alt="Google Book Search" width="108" height="40" border="0" align="absmiddle" / /><br />
    <input type="hidden" name="hl" value="en">
    <input type="hidden" name="sourceid" value="books-referral-partner">
    <input type="text" name="q" size="15" maxlength="255" value="" /><br />
    <input type="submit" name="btnG" value="Search" />
    </td>
  </tr>
</table>
</form>
 

Google | Google Blogoscoped

Add Google Book Search Widget to your Site