diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a3b929641..0210c2fa8 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -21,13 +21,8 @@ jobs:
       run: |
         rm -f README.md
         mv content/* .
-        mv etc/cover_small.jpg .
-        mv etc/cover_square.png .
-        mv etc/cover.jpg .
-        mv etc/style-custom.css .
+        mv book.json etc/
         mv etc/main.go .
-        mv etc/robots.txt .
-        mv etc/script-gitbook-plugin-disqus.js .
         npm install -g gitbook-cli
         gitbook install
         cd ~/.gitbook/versions/3.2.3 && npm i npm@5
@@ -73,12 +68,13 @@ jobs:
       run: |
         rm -f README.md
         mv content/* .
-        mv etc/cover_small.jpg .
-        mv etc/cover_square.png .
-        mv etc/cover.jpg .
         mv etc/main.go .
-        go run main.go -mode=ebook -adjustment=pre
+        rm -f book.json
         gitbook install
+        cd ~/.gitbook/versions/3.2.3 && npm i npm@5
+        cd ${{ github.workspace }}
+        mv etc/book.json .
+        go run main.go -mode=ebook -adjustment=pre
         mkdir _book/
     - name: 'Generating ebook in pdf'
       run: gitbook pdf ./ ./_book/dasarpemrogramangolang.pdf
diff --git a/etc/book.json b/content/book.json
similarity index 86%
rename from etc/book.json
rename to content/book.json
index dfc2a902a..e19acef6c 100644
--- a/etc/book.json
+++ b/content/book.json
@@ -7,6 +7,15 @@
         "meta",
         "sitemap"
     ],
+    "styles": {
+        "website": "style-website.css"
+    },
+    "pdf": {
+        "margin": {
+            "left": 10,
+            "right": 10
+        }
+    },
     "pluginsConfig": {
         "disqus": {
             "shortName": "dasarpemrogramangolang"
diff --git a/etc/cover.jpg b/content/cover.jpg
similarity index 100%
rename from etc/cover.jpg
rename to content/cover.jpg
diff --git a/etc/cover_small.jpg b/content/cover_small.jpg
similarity index 100%
rename from etc/cover_small.jpg
rename to content/cover_small.jpg
diff --git a/etc/cover_square.png b/content/cover_square.png
similarity index 100%
rename from etc/cover_square.png
rename to content/cover_square.png
diff --git a/etc/robots.txt b/content/robots.txt
similarity index 100%
rename from etc/robots.txt
rename to content/robots.txt
diff --git a/etc/script-gitbook-plugin-disqus.js b/content/script-gitbook-plugin-disqus.js
similarity index 100%
rename from etc/script-gitbook-plugin-disqus.js
rename to content/script-gitbook-plugin-disqus.js
diff --git a/etc/style-custom.css b/content/style-website.css
similarity index 100%
rename from etc/style-custom.css
rename to content/style-website.css
diff --git a/etc/main.go b/etc/main.go
index 7198e1662..ba73a6d74 100644
--- a/etc/main.go
+++ b/etc/main.go
@@ -178,13 +178,6 @@ func webbookPostAdjustment() {
 		</div>` + buttonToFind
 		htmlString = strings.ReplaceAll(htmlString, buttonToFind, buttonReplacement)
 
-		// ==== inject adjustment css
-		adjustmentCSSBuf, _ := os.ReadFile("./style-custom.css")
-		os.WriteFile("./_book/gitbook/style-custom.css", adjustmentCSSBuf, 0644)
-		adjustmentCSSToFind := `</head>`
-		adjustmentCSSReplacement := `<link rel="stylesheet" href="gitbook/style-custom.css?v=` + getVersion() + `">` + adjustmentCSSToFind
-		htmlString = strings.ReplaceAll(htmlString, adjustmentCSSToFind, adjustmentCSSReplacement)
-
 		// ==== inject github stars js script
 		buttonScriptToFind := `</head>`
 		buttonScriptReplacement := `<script async defer src="https://buttons.github.io/buttons.js"></script>` + buttonScriptToFind