bookstore/app/views/books/edit.html.erb

<div class='container'>
  <h4>Edit book</h4>
  <%= form_for @book do |f|%>
    <%= f.label :title %>
    <%= f.text_field :title %>
    <%= f.label :price %>
    <%= f.number_field :price, step: 0.01 %>
    <label>
      <div>
        <%= f.check_box :published, class: 'filled-in' %>
        <span>published</span>
      </div>
    </label>
    <%= f.submit 'Save changes', class: 'btn' %>
  <%end%>
</div>