diff --git a/css/src/ReadiumCSS-after-cjk-horizontal.css b/css/src/ReadiumCSS-after-cjk-horizontal.css
index 4e1763f..60d5be4 100644
--- a/css/src/ReadiumCSS-after-cjk-horizontal.css
+++ b/css/src/ReadiumCSS-after-cjk-horizontal.css
@@ -12,5 +12,4 @@
@import "modules/user-settings-submodules/ReadiumCSS-fontSize_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-lineHeight_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-paraSpacing_pref.css";
-@import "modules/ReadiumCSS-fs_normalize.css";
-@import "modules/ReadiumCSS-highlights.css";
\ No newline at end of file
+@import "modules/ReadiumCSS-fs_normalize.css";
\ No newline at end of file
diff --git a/css/src/ReadiumCSS-after-cjk-vertical.css b/css/src/ReadiumCSS-after-cjk-vertical.css
index 6b2e940..7cc99af 100644
--- a/css/src/ReadiumCSS-after-cjk-vertical.css
+++ b/css/src/ReadiumCSS-after-cjk-vertical.css
@@ -11,5 +11,4 @@
@import "modules/user-settings-submodules/ReadiumCSS-fontSize_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-lineHeight_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-paraSpacing-vertical_pref.css";
-@import "modules/ReadiumCSS-fs_normalize.css";
-@import "modules/ReadiumCSS-highlights.css";
\ No newline at end of file
+@import "modules/ReadiumCSS-fs_normalize.css";
\ No newline at end of file
diff --git a/css/src/ReadiumCSS-after-rtl.css b/css/src/ReadiumCSS-after-rtl.css
index be355db..e99cc18 100644
--- a/css/src/ReadiumCSS-after-rtl.css
+++ b/css/src/ReadiumCSS-after-rtl.css
@@ -15,5 +15,4 @@
@import "modules/user-settings-submodules/ReadiumCSS-paraSpacing_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-paraIndent_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-arabicLigatures_pref.css";
-@import "modules/ReadiumCSS-fs_normalize.css";
-@import "modules/ReadiumCSS-highlights.css";
\ No newline at end of file
+@import "modules/ReadiumCSS-fs_normalize.css";
\ No newline at end of file
diff --git a/css/src/ReadiumCSS-after.css b/css/src/ReadiumCSS-after.css
index 6416381..a3ea3f7 100644
--- a/css/src/ReadiumCSS-after.css
+++ b/css/src/ReadiumCSS-after.css
@@ -18,5 +18,4 @@
@import "modules/user-settings-submodules/ReadiumCSS-paraIndent_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-wordSpacing_pref.css";
@import "modules/user-settings-submodules/ReadiumCSS-letterSpacing_pref.css";
-@import "modules/ReadiumCSS-fs_normalize.css";
-@import "modules/ReadiumCSS-highlights.css";
\ No newline at end of file
+@import "modules/ReadiumCSS-fs_normalize.css";
\ No newline at end of file
diff --git a/css/src/modules/ReadiumCSS-highlights.css b/css/src/modules/ReadiumCSS-highlights.css
deleted file mode 100644
index af6d819..0000000
--- a/css/src/modules/ReadiumCSS-highlights.css
+++ /dev/null
@@ -1,40 +0,0 @@
-/* Readium CSS
- Default highlights
-
- A stylesheet for user highlights
-
- Repo: https://github.com/readium/readium-css */
-
-
-/* User Highlights */
-
-.readiumCSS-yellow-highlight,
-:root:--sepia-mode .readiumCSS-yellow-highlight,
-:root:--night-mode .readiumCSS-yellow-highlight {
- background-color: rgba(255, 255, 0, 0.5) !important;
-}
-
-.readiumCSS-green-highlight,
-:root:--sepia-mode .readiumCSS-green-highlight,
-:root:--night-mode .readiumCSS-green-highlight {
- background-color: rgba(0, 255, 0, 0.5) !important;
-}
-
-.readiumCSS-orange-highlight,
-:root:--sepia-mode .readiumCSS-orange-highlight,
-:root:--night-mode .readiumCSS-orange-highlight {
- background-color: rgba(255, 165, 0, 0.5) !important;
-}
-
-.readiumCSS-pink-highlight,
-:root:--sepia-mode .readiumCSS-pink-highlight,
-:root:--night-mode .readiumCSS-pink-highlight {
- background-color: rgba(255, 105, 180, 0.5) !important;
-}
-
-/* Media overlays */
-
-.readiumCSS-mo-active-default {
- background-color: yellow !important;
- color: black !important;
-}
\ No newline at end of file
diff --git a/docs/CSS06-stylesheets_order.md b/docs/CSS06-stylesheets_order.md
index 77e48dc..1515318 100644
--- a/docs/CSS06-stylesheets_order.md
+++ b/docs/CSS06-stylesheets_order.md
@@ -46,11 +46,10 @@ The following modules must be appended after the author’s stylesheets (`Readiu
1. `ReadiumCSS-config.css`
2. `ReadiumCSS-pagination.css` (or `ReadiumCSS-pagination-vertical.css` for CJK – vertical writing mode)
3. `ReadiumCSS-scroll.css` (or `ReadiumCSS-scroll-vertical.css` for CJK – vertical writing mode)
-4. `ReadiumCSS-highlights.css`
-5. `ReadiumCSS-night_mode.css`
-6. `ReadiumCSS-sepia_mode.css`
-7. `ReadiumCSS-os_a11y.css`
-8. User settings:
+4. `ReadiumCSS-night_mode.css`
+5. `ReadiumCSS-sepia_mode.css`
+6. `ReadiumCSS-os_a11y.css`
+7. User settings:
1. `ReadiumCSS-colNumber_pref.css` (does not apply to CJK – vertical writing mode)
2. `ReadiumCSS-pageMargins_pref.css` (or `ReadiumCSS-pageMargins-vertical_pref.css` for CJK – vertical writing mode)
3. `ReadiumCSS-customColors_pref.css`
@@ -65,4 +64,4 @@ The following modules must be appended after the author’s stylesheets (`Readiu
12. `ReadiumCSS-wordSpacing_pref.css` (does not apply to RTL and CJK scripts)
13. `ReadiumCSS-letterSpacing_pref.css` (does not apply to RTL and CJK scripts)
14. `ReadiumCSS-arabicLigatures_pref.css` (RTL only)
-9. `ReadiumCSS-fs_normalize.css`
\ No newline at end of file
+8. `ReadiumCSS-fs_normalize.css`
\ No newline at end of file
diff --git a/docs/ReadiumCSS_docs.epub b/docs/ReadiumCSS_docs.epub
index f6e72bd..facb364 100644
Binary files a/docs/ReadiumCSS_docs.epub and b/docs/ReadiumCSS_docs.epub differ
diff --git a/docs/ReadiumCSS_docs/OEBPS/Text/Section-006.xhtml b/docs/ReadiumCSS_docs/OEBPS/Text/Section-006.xhtml
index 36b5c30..029f037 100644
--- a/docs/ReadiumCSS_docs/OEBPS/Text/Section-006.xhtml
+++ b/docs/ReadiumCSS_docs/OEBPS/Text/Section-006.xhtml
@@ -85,8 +85,6 @@
ReadiumCSS-scroll.css (or ReadiumCSS-scroll-vertical.css for CJK – vertical writing mode)
- ReadiumCSS-highlights.css
-
ReadiumCSS-night_mode.css
ReadiumCSS-sepia_mode.css