diff --git a/.github/workflows/notebooks.yml b/.github/workflows/notebooks.yml
index e2ab8a9..990bd88 100644
--- a/.github/workflows/notebooks.yml
+++ b/.github/workflows/notebooks.yml
@@ -30,9 +30,6 @@ jobs:
       - name: Install the project dependencies
         run: |
           poetry install --with dev
-  notebooks:
-    runs-on: ubuntu-latest
-    steps:
       - name: build books
         run: poetry run jupyter-book build notebooks
       - name: Github Pages action
diff --git a/notebooks/L0_overview.ipynb b/notebooks/L0_overview.ipynb
index ee4791a..336269d 100644
--- a/notebooks/L0_overview.ipynb
+++ b/notebooks/L0_overview.ipynb
@@ -50,7 +50,8 @@
     "tags": [
      "hide-cell",
      "remove-output"
-    ]
+    ],
+    "is_executing": true
    },
    "outputs": [],
    "source": [
@@ -75,7 +76,8 @@
     "slideshow": {
      "slide_type": ""
     },
-    "tags": []
+    "tags": [],
+    "is_executing": true
    },
    "outputs": [],
    "source": [
@@ -131,7 +133,8 @@
      "base_uri": "https://localhost:8080/"
     },
     "id": "G9YEQptYvCgx",
-    "outputId": "2a9b5b22-be50-4bb7-ae93-af7e65e7442a"
+    "outputId": "2a9b5b22-be50-4bb7-ae93-af7e65e7442a",
+    "is_executing": true
    },
    "outputs": [],
    "source": [
diff --git a/notebooks/_static/images/tianshou-logo.png b/notebooks/_static/images/tianshou-logo.png
new file mode 100644
index 0000000..fa31829
Binary files /dev/null and b/notebooks/_static/images/tianshou-logo.png differ