title: Web API not returning a specific List of entities
body: <p>I am interested in a BOOKS entities from edm framework only.
  However I am getting some other entities along with BOOKS entity.</p>
  
  <p>Here is my web API controller</p>
  
  <pre><code>public class BooksController : ApiController
  {
      private MyECommerceDBEntities db = new MyECommerceDBEntities();
  
      // GET: api/Books
      [ResponseType(typeof(BOOKS))]
      public IQueryable&lt;BOOKS&gt; GetBOOKS()
      {
          return db.BOOKS.OrderByDescending(x =&gt; x.BOOKID).Skip(977).Take(5).AsQueryable&lt;BOOKS&gt;();
      }
  }
  </code></pre>
  
  <p>Here is my returned JSON string</p>
  
  <pre><code>[{"$id":"1","PRODUCTS":{"$id":"2","MOVIES":[],"ORDERITEMS":[],"PRODUCTDETAILS":[],"SUBCATEGORIES":{"$id":"3","CATEGORIES":{"$id":"4","SUBCATEGORIES":[{"$ref":"3"},{"$id":"5","CATEGORIES":{"$ref":"4"},"PRODUCTS":[],"SUBCATEGORYID":2,"CATEGORYID":1,"SUBCATEGORY":"Kindle Edition","DESCRIPTION":"Kindle EBook"}],"CATEGORYID":1,"CATEGORY":"Books","DESCRIPTION":"Books"},"PRODUCTS":[{"$ref":"2"},{"$id":"6","MOVIES":[],"ORDERITEMS":[],"PRODUCTDETAILS":[],"SUBCATEGORIES":{"$ref":"3"},"REVIEWS":[],"SELLERS_PRODUCTS":[],"CART":[],"BOOKS":[{"$id":"7","PRODUCTS":{"$ref":"6"},"BOOKID":1,"PRODUCTID":1964,"ISBN10":"ISBN-10: 1-934356-43","ISBN13":"ISBN-13: 978-1-93435","BOOKNAME":"Agile Coaching","DESCRIPTION":"","AUTHOR":null,"PUBLISHER":null,"PAGES":"236","BOOKIMAGE":"Agile `Coaching.jpeg","PUBLISHEDDATE":null}],"PRODUCTID":1964,"SUBCATEGORYID":1,"NAME":"Agile Coaching","DESCRIPTION":"","PRICE":0.0},{"$id":"8","MOVIES":[],"ORDERITEMS":[],"PRODUCTDETAILS":[],"SUBCATEGORIES":{"$ref":"3"},"REVIEWS":[],"SELLERS_PRODUCTS":[],"CART":[],"BOOKS":`
  </code></pre>