diff --git a/books/free-programming-books-id.md b/books/free-programming-books-id.md
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--- a/books/free-programming-books-id.md
+++ b/books/free-programming-books-id.md
@@ -70,8 +70,10 @@
 
 ### HTML and CSS
 
+* [Cara Cepat dan Mudah Menguasai CSS Rule](https://gilacoding.com/upload/file/Mahir-menguasai-CSS-Part%201.pdf) - Rudy Devianto (PDF)
 * [Ebook Belajar HTML Dan CSS Dasar](https://www.malasngoding.com/download-ebook-belajar-html-dan-css-dasar-gratis/)
 * [Ebook HTML CSS Manual Dasar](https://github.com/LIGMATV/LIGMATV/wiki/Ebook-HTML-CSS-Manual-Dasar) - Muhammad Danish Naufal (PDF, DOCX)
+* [Mahir Menguasai CSS - Tutorial & Praktek](https://gilacoding.com/upload/file/Mahir-menguasai-CSS-Part%202.pdf) - Rudy Devianto (PDF)
 * [Tutorial Dasar CSS untuk Pemula](https://www.petanikode.com/tutorial/css/) - Ahmad Muhardian (Petani Kode) *( :construction: dalam proses)*
 * [Tutorial HTML untuk Pemula](https://www.petanikode.com/tutorial/html/) - Ahmad Muhardian (Petani Kode)