Getting the Page Source of website

See more:

C#

Visual-Studio

HTML

HTTP

Hi, I seem to be having trouble using the code of some websites for example the page source at

view-source:http://www.booksamillion.com/search?id=5910205702379&query=hunger+games&where=book_title&search.x=24&search.y=9&search=Search&affiliate=&sort=price_ascending

I am trying to get the Link of the book as well as the price from this:

<div class="meta">


        <span class="title"><a href="http://www.booksamillion.com/p/Hunger-Games-Sparknotes-Literature-Guide/SparkNotes/9781411470989?id=5910205702379" title="The Hunger Games Sparknotes Literature Guide"><img src="http://covers2.booksamillion.com/covers/bam/1/41/147/098/1411470982_t.jpg" width="60" alt="The Hunger Games Sparknotes Literature Guide">The Hunger Games Sparknotes Literature Guide</a> (Paperback)</span>

        <span class="byline">by <a href="search?type=author&query=SparkNotes&id=5910205702379" title="SparkNotes">SparkNotes</a>, <a href="search?type=author&query=Suzanne Collins&id=5910205702379" title="Suzanne Collins">Suzanne Collins</a>

        <br>ISBN 9781411470989 / February 2014</span>
        <br><br>
<span class="ebook-price">Online Price: $5.95</span>

<span class="ebook-price">Marketplace Price from: $6.39</span>

        <div class="availability_search_results">In Stock.</div>
    </div><!-- end meta -->

This is what I have as code at the moment:

string getPrice = string.Empty;
       string getUrl = string.Empty;
       HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();
       htmlDoc.OptionFixNestedTags = true;
       htmlDoc.LoadHtml(responseData); // load html
       HtmlAgilityPack.HtmlNode rootNode = htmlDoc.DocumentNode;
       HtmlAgilityPack.HtmlNodeCollection allBookResults = rootNode.SelectNodes("//div[@class='meta']");


       foreach (HtmlAgilityPack.HtmlNode node in allBookResults)
       {
           getUrl = node.SelectSingleNode("//span[@class='byline']").GetAttributeValue("content", null).ToString();
           HtmlAgilityPack.HtmlNode dataNode = node.SelectSingleNode("//span[@class='ebook-price']");

           foreach (HtmlAgilityPack.HtmlNode bookPriceNode in dataNode.ChildNodes)
           {
               getPrice = bookPriceNode.SelectSingleNode("//span[@class='ebook-price']").GetAttributeValue("content", null).ToString();
           }
       }

It seems that the code I have is not properly written since I am getting a null error when debugging. Could I get a small explanation on the different uses and capture of span classes and property so I can get a rough idea on how to capture the book link and price from other websites aswell?

Thanks a bunch!