diff --git a/book/_config.yml b/book/_config.yml
index c8494c3..8ed68a6 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -1,8 +1,8 @@
 # Book settings
 title: Computational Thermodynamics
 author: Kyle Niemeyer
-copyright: '2020'
-logo: 'images/logo/logo.png'
+copyright: "2020"
+logo: "images/logo/logo.png"
 
 email: kyle.niemeyer@oregonstate.edu
 
@@ -14,6 +14,8 @@ execute_notebooks: auto
 html:
   favicon: images/logo/favicon.ico
   home_page_in_navbar: true
+  use_repository_button: true
+  extra_navbar: Powered by <a href="https://jupyterbook.org">Jupyter Book</a>  # Will be displayed underneath the left navbar.
 
 #baseurl: "/computational-thermo" # the subpath of your site, e.g. /blog. If there is no subpath for your site, use an empty string ""
 #url: "https://kyleniemeyer.github.io" # the base hostname & protocol for your site, e.g. http://example.com
@@ -31,9 +33,10 @@ binder:
   binderhub_url: "https://mybinder.org"
   text: "Launch binder"
 
-sphinx:
-  extra_extensions: ""
+#sphinx:
+#  extra_extensions: []
 
 latex:
   latex_documents:
-    targetname: book.tex
\ No newline at end of file
+    targetname: book.tex
+  latex_engine: pdflatex  # one of 'pdflatex', 'xelatex' (recommended for unicode), 'luatex', 'platex', 'uplatex'
\ No newline at end of file
diff --git a/book/_toc.yml b/book/_toc.yml
index 77280e1..d9cd094 100644
--- a/book/_toc.yml
+++ b/book/_toc.yml
@@ -2,64 +2,66 @@
 - file: content/intro
   title: Introduction
 
-- file: content/getting-started
-  expand_sections: true
-  sections:
+- part: Getting started
+  #expand_sections: true
+  #- file: content/getting-started
+  chapters:
     - file: content/setting-up-environment
     - file: content/intro-solving-problems
     - file: content/intro-using-coolprop
     - file: content/using-scipy
+    
 
-- header: Modules
+- part: Modules
+  chapters:
+  - file: content/first-law/first-law
+    sections:
+      - file: content/first-law/steam-water-equilibrium
+      - file: content/first-law/portable-cooling-system
+      - file: content/first-law/hydrogen-storage-tanks
+      - file: content/first-law/air-tank
 
-- file: content/first-law/first-law
-  sections:
-    - file: content/first-law/steam-water-equilibrium
-    - file: content/first-law/portable-cooling-system
-    - file: content/first-law/hydrogen-storage-tanks
-    - file: content/first-law/air-tank
+  - file: content/second-law/second-law
+    sections:
+      - file: content/second-law/vortex-tube
+      - file: content/second-law/heating-water
+      - file: content/second-law/turbine-efficiency
+      - file: content/second-law/solar-powered-pump
 
-- file: content/second-law/second-law
-  sections:
-    - file: content/second-law/vortex-tube
-    - file: content/second-law/heating-water
-    - file: content/second-law/turbine-efficiency
-    - file: content/second-law/solar-powered-pump
+  - file: content/exergy/exergy
+    sections:
+      - file: content/exergy/second-law-efficiency
 
-- file: content/exergy/exergy
-  sections:
-    - file: content/exergy/second-law-efficiency
+  - file: content/properties-pure/properties-pure
+    sections: 
+      - file: content/properties-pure/reduced-helmholtz
 
-- file: content/properties-pure/properties-pure
-  sections: 
-    - file: content/properties-pure/reduced-helmholtz
+  - file: content/mixtures/mixtures
+    sections: 
+      - file: content/mixtures/multicomponent-phase-equilibrium
 
-- file: content/mixtures/mixtures
-  sections: 
-    - file: content/mixtures/multicomponent-phase-equilibrium
+  - file: content/combustion/combustion
+    sections: 
+      - file: content/combustion/adiabatic-flame-temperature
+      - file: content/combustion/heating-values
+      - file: content/combustion/furnace-efficiency
 
-- file: content/combustion/combustion
-  sections: 
-    - file: content/combustion/adiabatic-flame-temperature
-    - file: content/combustion/heating-values
-    - file: content/combustion/furnace-efficiency
+  - file: content/chemical-equilibrium/chemical-equilibrium
+    sections:
+      - file: content/chemical-equilibrium/equilibrium-constant
+      - file: content/chemical-equilibrium/equilibrium-alternative-methods
+      - file: content/chemical-equilibrium/adiabatic-flame-temperature
+      - file: content/chemical-equilibrium/combustion-acetylene
 
-- file: content/chemical-equilibrium/chemical-equilibrium
-  sections:
-    - file: content/chemical-equilibrium/equilibrium-constant
-    - file: content/chemical-equilibrium/equilibrium-alternative-methods
-    - file: content/chemical-equilibrium/adiabatic-flame-temperature
-    - file: content/chemical-equilibrium/combustion-acetylene
+  - file: content/stat-thermo/stat-thermo
+    sections:
+      - file: content/stat-thermo/monatomic-gas
+      - file: content/stat-thermo/diatomic-gases
 
-- file: content/stat-thermo/stat-thermo
-  sections:
-    - file: content/stat-thermo/monatomic-gas
-    - file: content/stat-thermo/diatomic-gases
-
-- header: Reference
-
-- file: content/zbibliography
-- file: content/contributing
+- part: Reference
+  chapters:
+  - file: content/zbibliography
+  - file: content/contributing
 
 # - file: https://github.com/kyleniemeyer/computational-thermo
 #   title: GitHub repository