BlackFoks

<div class="editor-label">
    <%= Html.LabelFor(model => model.Authors) %>
</div>
<span id="authorChackboxes">
    <% List<Author> authors = ViewData["authors"] as List<Author>;
       foreach (Author author in authors)
       {
            string checkboxId = string.Format("author{0}", author.Id); %>                   
            <input type="checkbox"
                   id="<%= Html.Encode(checkboxId) %>"

BlackFoks

//
// GET: /Book/Create
public ActionResult Create()
{
    ViewData["authors"] = _entities.Authors.ToList<Author>();
    return View();
}