diff --git a/src/theme/book.js b/src/theme/book.js
index 21295140..c3cbcfcc 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -33,6 +33,7 @@ $( document ).ready(function() {
     };
 
     $(document).on('keydown', function (e) {
+        if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; }
         switch (e.keyCode) {
             case KEY_CODES.NEXT_KEY:
                 e.preventDefault();