diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 000000000..1e795c55d
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,27 @@
+version: 2.1
+jobs:
+  build_book:
+    docker:
+      - image: cimg/python:3.9
+    steps:
+      - checkout
+      - run:
+          name: setup environment
+          command: |
+            pip install --upgrade pip
+            pip install nox
+            pip list
+      - run:
+          name: Build book html 
+          command: nox -s docs
+
+      - store_artifacts:
+          path: _build/html
+          destination: html
+
+# Tell CircleCI to use this workflow when it builds the site
+workflows:
+  version: 2
+  build_book:
+    jobs:
+      - build_book
diff --git a/README.md b/README.md
index 5b8dd393a..c41822d7b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# <img src="images/logo/logo.png" width=40 /> pyOpenSci Packaging Guide
+# <img src="images/logo/logo.png" width=40 /> pyOpenSci Scientific Python Open Source Packaging Guide
 
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/pyopensci/python-package-guide?color=purple&display_name=tag&style=plastic)
 
diff --git a/_static/pyos.css b/_static/pyos.css
new file mode 100644
index 000000000..f894a1d8b
--- /dev/null
+++ b/_static/pyos.css
@@ -0,0 +1,93 @@
+html, body {
+    font-size: 1.1rem;
+}
+
+body p {
+    /* font-family: $header-font; */
+    font-size: 1em;
+    font-family: 'Verdana', sans-serif!important;
+    color: #555!important;
+    line-height: 1.5em;
+}
+
+h1, h2, h3 {
+    font-family: 'Trebuchet MS', sans-serif;
+    color: #333!important;
+}
+
+h1 {
+    padding-bottom: 1em!important;
+}
+
+h3 {
+    padding-top: 1.4em;
+    margin-bottom: 14px;
+}
+
+/* hide the right sidebar */
+.col-md-3 .bd-toc .show .noprint {
+    display: none!important;
+}
+
+#main-content {
+    max-width: 80%;
+}
+
+.bd-toc {
+    color: #1abc9c;
+}
+
+@media (min-width: 720px){
+.col-md-3 {
+  flex: 0 0 25%;
+  /* max-width: 25%; */
+  display: none!important;
+    }
+}
+
+
+/* HEADER BLOCK 2 */ 
+div.header__block { 
+color: #222;
+}
+
+.announcement div {
+background-color: #ccc;
+} 
+
+.header-item.announcement, .header-item.announcement .noprint {
+    background-color:#ccc;
+}
+
+div .announcement .header-item .noprint, header-item.announcement {
+    background-color: #ccc!important;
+}
+
+/* notes */
+
+div.admonition.note .admonition-title, div.admonition.note .admonition-title::before {
+    background-color: #C1CFD4;
+    color: #222;
+
+}
+
+div.admonition.note {
+    border-color: #C1CFD4;
+    background-color: #E3F4FA;
+}
+
+
+div.admonition.important .admonition-title, div.admonition.important .admonition-title::before {
+background-color: #107762;
+color: #ffffff!important;
+}
+
+div.admonition.important .admonition-title {
+background-color: #107762;
+border-color: #1abc9c;
+}
+
+div.admonition.important {
+    border-color: #0e6654;
+    background-color: #ecfcf9;
+}
diff --git a/conf.py b/conf.py
index d32f54142..1839adea9 100644
--- a/conf.py
+++ b/conf.py
@@ -32,7 +32,6 @@
 # ones.
 extensions = [
     "myst_nb",
-    # "myst_parser",
     "sphinx_design",
     "sphinx_copybutton",
     "sphinx.ext.intersphinx"
@@ -47,9 +46,10 @@
     "repository_url": "https://github.com/pyopensci/python-package-guide",
     "use_repository_button": True,
     "google_analytics_id": "UA-141260825-1",
+    "show_toc_level": 1,
+    "toc_title": "On this page",
     "external_links": [
-      {"name": "link-one-name", "url": "https://www.pyopensci.org"},
-      {"name": "link-two-name", "url": "https://pyopensci.org"}
+      {"pyOpenSci Website": "link-one-name", "url": "https://www.pyopensci.org"}
   ],
   "announcement": "🚧 UNDER CONSTRUCTION: this guide is under heavy construction right now. 🚧"
 }
@@ -79,6 +79,7 @@
 #
 html_theme = 'sphinx_book_theme'
 html_static_path = ["_static"]
+html_css_files = ["pyos.css"]
 html_title = "pyOpenSci Package Guide"
 html_logo = "images/logo/logo.png"
 
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new file mode 100644
index 000000000..eb2cf42e7
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diff --git a/images/logo/logo.png b/images/logo/logo.png
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