diff --git a/book.json b/book.json
deleted file mode 100644
index 3c6d55c..0000000
--- a/book.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "plugins": ["exercises"]
-}
\ No newline at end of file
diff --git a/kapitel-3.md b/kapitel-3.md
index 6c68586..4c4fe21 100644
--- a/kapitel-3.md
+++ b/kapitel-3.md
@@ -1,24 +1 @@
-# Kapitel 3: Übertragungsprotokolle und Datentransformationen \(02.11.2017\)
-
-{% exercise %}
-Define a variable `x` equal to 10.
-
-{% initial %}
-var x =
-
-{% solution %}
-var x = 10;
-
-{% validation %}
-assert(x == 10);
-
-{% context %}
-// This is context code available everywhere
-// The user will be able to evaluate `exposedVar`
-var exposedVar = 3;
-// ... or call `exposedFunction`
-function exposedFunction {
-    return 3;
-}
-{% endexercise %}
-
+# Kapitel 3: Übertragungsprotokolle und Datentransformationen \(02.11.2017\)
\ No newline at end of file