diff --git a/wp-content/plugins/candela-lti/candela-lti.php b/wp-content/plugins/candela-lti/candela-lti.php
index 134f0261..f2437c3e 100644
--- a/wp-content/plugins/candela-lti/candela-lti.php
+++ b/wp-content/plugins/candela-lti/candela-lti.php
@@ -14,6 +14,12 @@
 // If file is called directly, abort.
 if ( ! defined( 'ABSPATH' ) ) exit;
 
+// session_start() called in pressbooks.php
+if (!isset($_SESSION['LTI_session'])) {
+    session_start();
+    $_SESSION['LTI_session'] = array();
+}
+
 // Do our necessary plugin setup and add_action routines.
 CandelaLTI::init();
 
@@ -114,10 +120,10 @@ public static function lti_launch() {
       } else {
         $slash = '/';
       }
-
+//-REMOVE DEFUNCT(?) 'content_only' REDIRECTS?
       // todo make all the hide_* parameters copy over?
       // If it's a deep LTI link default to showing content_only
-      wp_redirect( get_bloginfo('wpurl') . $slash . $page . "?content_only" );
+//-     wp_redirect( get_bloginfo('wpurl') . $slash . $page . "?content_only" );
       exit;
     }
 
@@ -125,7 +131,7 @@ public static function lti_launch() {
     // candela/api/lti/BLOGID?page_id=10
     if ( ! empty($wp->query_vars['page_id'] ) && is_numeric($wp->query_vars['page_id']) ) {
       switch_to_blog((int)$wp->query_vars['blog']);
-      wp_redirect( get_bloginfo('wpurl') . "?p=" . $wp->query_vars['page_id'] . "&content_only" );
+//-     wp_redirect( get_bloginfo('wpurl') . "?p=" . $wp->query_vars['page_id'] . "&content_only" );
       exit;
     }
 
@@ -133,7 +139,7 @@ public static function lti_launch() {
     // custom_page_id=10
     if ( ! empty($wp->query_vars['custom_page_id'] ) && is_numeric($wp->query_vars['custom_page_id']) ) {
       switch_to_blog((int)$wp->query_vars['blog']);
-      wp_redirect( get_bloginfo('wpurl') . "?p=" . $wp->query_vars['custom_page_id'] . "&content_only" );
+//-     wp_redirect( get_bloginfo('wpurl') . "?p=" . $wp->query_vars['custom_page_id'] . "&content_only" );
       exit;
     }
 
@@ -643,4 +649,3 @@ public static function remove_db_table() {
   }
 
 }
-
diff --git a/wp-content/plugins/candela-utility/themes/bombadil/functions.php b/wp-content/plugins/candela-utility/themes/bombadil/functions.php
index 8d1b3875..6b3d224a 100644
--- a/wp-content/plugins/candela-utility/themes/bombadil/functions.php
+++ b/wp-content/plugins/candela-utility/themes/bombadil/functions.php
@@ -123,3 +123,7 @@ function add_iframe_resize_message() {
   );
 
 }
+
+function LTI_display_header() {
+    isset($_SESSION['LTI_session']);
+}
diff --git a/wp-content/plugins/candela-utility/themes/bombadil/header.php b/wp-content/plugins/candela-utility/themes/bombadil/header.php
index 56e38e27..ca62cfe0 100644
--- a/wp-content/plugins/candela-utility/themes/bombadil/header.php
+++ b/wp-content/plugins/candela-utility/themes/bombadil/header.php
@@ -80,7 +80,7 @@
           <a href="#main-content">Skip to main content</a>
         </div>
 
-        <?php if (!isset($_GET['content_only'])) { ?>
+        <?php if(!LTI_display_header()){ ?>
         <div class="row">
           <nav role="navigation">
             <!-- Book Title -->