Recently I created a book in Drupal using two Content Types. One type called Book Description (which has a cover, an ID and some other CCK fields) and another type called Book Page. So far so good. Problems arose when I tried to setup Pathauto. For the Book Description I entered book/[field_book_id-raw], which worked great. For the Book Pages I needed something like book/[field_book_id-raw]/title-of-my-page. This is where I got stuck.