title: Fetch the book info with the ISBN number via Amazon WebServices
body: <p>I need to connect to Amazon WebServices to get the info of a book with the ISBN number given by the user.</p>
  
  <p>The problem is that I don`t know how to do this. 
  I don´t have found any good documentation to do this in google. </p>
  
  <p>I am newbie in rails. So, anybody can give tips to do this?</p>
  
  <p>Which is the best gem to connect to Amazon WebServices with Rest? 
  Which is exactly the name of the webservice of Amazon to get the book info? </p>
  
  <p>Thanks in advance.</p>