diff --git a/bookish/services/converter.py b/bookish/services/converter.py
index 50bbc62..b9e30ae 100644
--- a/bookish/services/converter.py
+++ b/bookish/services/converter.py
@@ -86,8 +86,6 @@ def _convert_with_pandoc(input_path, output_path, input_format, output_format, t
         extra_args += ["--metadata", "title=Converted Document"]
     if output_format == "html":
         extra_args += ["--self-contained", "--mathjax"]
-    if input_format == "pdf":
-        extra_args += ["--pdf-engine=pdflatex"]
 
     pandoc_input = _to_pandoc_format(input_format)
     pandoc_output = _to_pandoc_format(output_format)
@@ -152,19 +150,4 @@ def _convert_docx_to_pdf(input_path, output_path, task_id):
 
 def _post_process(output_path, output_format):
     """Post-processing opzionale sul file generato."""
-    if output_format == "epub":
-        _fix_epub_metadata(output_path)
-
-
-def _fix_epub_metadata(epub_path):
-    """Aggiunge metadati minimi all'epub se mancanti."""
-    try:
-        import zipfile
-        import tempfile
-
-        with zipfile.ZipFile(epub_path, "r") as z:
-            content = z.read("META-INF/container.xml")
-            if b"<dc:title>" not in content:
-                pass
-    except Exception:
-        pass
+    pass
diff --git a/bookish/static/js/reader.js b/bookish/static/js/reader.js
index e05ae9b..c7c4341 100644
--- a/bookish/static/js/reader.js
+++ b/bookish/static/js/reader.js
@@ -56,9 +56,9 @@
             if (e.key === "-") changeFontSize(rendition, -2);
         });
 
-        // Toolbar controls
-        document.getElementById("zoomIn").addEventListener("click", () => rendition.next());
-        document.getElementById("zoomOut").addEventListener("click", () => rendition.prev());
+        // Zoom controls
+        document.getElementById("zoomIn").addEventListener("click", () => changeFontSize(rendition, 2));
+        document.getElementById("zoomOut").addEventListener("click", () => changeFontSize(rendition, -2));
 
         // Store ref for theme
         window._rendition = rendition;
@@ -151,29 +151,16 @@
         const viewer = document.getElementById("textViewer");
         if (!viewer) return;
 
-        // Convert text via Pandoc on backend
         fetch(`/reader/serve/${encodeURIComponent(file)}`)
             .then((r) => r.text())
-            .then((content) => {
-                if (ext === "md" || ext === "fb2" || ext === "docx") {
-                    // Pandoc converts these to HTML on load for reader
-                    // But we need the HTML version. Try to get pre-converted HTML.
-                    fetch(`/reader/serve/${encodeURIComponent(file)}`)
-                        .then((r) => r.text())
-                        .then((text) => {
-                            // For plain text (md, txt), render as HTML with simple formatting
-                            if (ext === "md") {
-                                viewer.innerHTML = simpleMarkdownToHtml(text);
-                            } else {
-                                viewer.innerHTML = `<pre style="white-space:pre-wrap;font-family:inherit;font-size:1rem;line-height:1.8;">${escapeHtml(text)}</pre>`;
-                            }
-                        });
+            .then((text) => {
+                if (ext === "md") {
+                    viewer.innerHTML = simpleMarkdownToHtml(text);
                 } else if (ext === "html") {
-                    // Direct HTML content
-                    viewer.innerHTML = content;
+                    viewer.innerHTML = text;
                     fixLinks(viewer);
                 } else {
-                    viewer.textContent = content;
+                    viewer.innerHTML = `<pre style="white-space:pre-wrap;font-family:inherit;font-size:1rem;line-height:1.8;">${escapeHtml(text)}</pre>`;
                 }
             });