class BookListView(generic.ListView):
model = Book
context_object_name = 'my_book_list'
queryset = Book.objects.all()
template_name = 'books/my_arbitrary_template_name_list.html'
def get_context_data(self, **kwargs):
context = super(BookListView, self).get_context_data(**kwargs)
context['second_queryset'] = # YOUR QUERY HERE
return context