I often use Lynx to browse my Drupal site and i think that we should use "REL" and "REV" other than "stylesheet" in LINK for a higher accessibility, specially for books navigation... For those who are not familiar with that stuff, here are some nice links : <http://www.w3.org/MarkUp/HTMLPlus/htmlplus_55.html> <http://diveintoaccessibility.org/day_9_providing_additional_navigation_aids.html> <http://wordpress.org/support/topic/39661> Now, here is my question. Does Drupal core (specially book.module, or is it a theme specific trick?) provide native support for that? If yes, how to use it? If no, any one has idea how to add this? Thanks