diff --git a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/02.optical-phenomena/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/02.optical-phenomena/textbook.en.md
index ef2b920ac..d987d249d 100644
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/02.optical-phenomena/textbook.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/02.optical-phenomena/textbook.en.md
@@ -1,4 +1,6 @@
 ---
 title: 'Optical phenomena'
+published: false
+visible: false
 ---