DesignMainViewModel.cs

public class DesignMainViewModel : IMainViewModel
{
   public static IPerson fakePerson = new Person()
   {
       Name = "Raymond Domenech",
       Age = 62,
       Books = new IBook[0]
   };

   public static IPerson fakePerson2 = new Person()
   {
       Name = "Victor Hugo",
       Age = 45,
       Books = new IBook[0]
   };

   public IPerson SelectedPerson
   {
       get
       {
           return fakePerson;
       }
       set
       {
           throw new NotImplementedException();
       }
   }

   public IList<IPerson> AvailablePersons
   {
       get {return new []{fakePerson, fakePerson2}; }
   }

   public ISummaryTabViewModel SummaryTabViewModel
   {
       get { return new DesignSummaryTabViewModel(); }
   }

   public IBooksWrittenTabViewModel BooksWrittenTabViewModel
   {
       get { return new DesignBooksWrittenTabViewModel(); }
   }
}