diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 74683de..48d315d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,17 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          repository: mainmatter/core-sans-a-fonts
+          ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
+          path: core-sans-a-fonts
+      - name: Install Fonts
+        run: |
+          sudo cp -r core-sans-a-fonts/* /usr/local/share/fonts/
+          sudo fc-cache -f -v
+          fc-list | grep "Core Sans"
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - name: Install exercise plugin
         run: cargo install --path helpers/mdbook-exercise-linker
diff --git a/book/book.toml b/book/book.toml
index 7fb2b6e..a49ae4c 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -28,29 +28,40 @@ show-hidden-lines = true
 [output.pandoc.profile.pdf] # options to pass to Pandoc (see https://pandoc.org/MANUAL.html)
 output-file = "100-exercises-to-learn-rust.pdf"
 to = "latex"
-highlight-style = "tango"
+highlight-style = "./custom.theme"
 # We use `lualatext` because, right now, it's the only engine
 # that supports fallback fonts, which we need for emojis.
 pdf-engine = "lualatex"
 metadata-file = "metadata.yml"
 
 [output.pandoc.profile.pdf.variables]
+mainfont = "CoreSansA45.ttf"
+mainfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
+sansfont = "CoreSansA45.ttf"
+sansfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
 # You can get these fonts here: https://fonts.google.com/selection?query=noto+color+
-mainfont = "Noto Serif"
-sansfont = "Noto Sans"
 monofont = "Noto Sans Mono"
 mainfontfallback = ["Noto Color Emoji:mode=harf"]
 sansfontfallback = ["Noto Color Emoji:mode=harf"]
 monofontfallback = [
   "Noto Color Emoji:mode=harf",
 ]
-linkcolor = "blue"
-urlcolor = "blue"
+linkcolor = "Links"
+urlcolor = "Links"
 urlstyle = "rm"
 documentclass = "book"
-fontsize = "11pt"
+fontsize = "10pt"
 geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.4cm,right=2.4cm"
 header-includes = [
+  "\\definecolor{Links}{HTML}{6200EE}",
   # Reduce font size of code blocks
   "\\DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\\\\{\\},fontsize=\\small}",
 ]
@@ -65,20 +76,33 @@ metadata-file = "metadata.yml"
 pdf-engine = "lualatex"
 
 [output.pandoc.profile.paperback.variables]
+mainfont = "CoreSansA45.ttf"
+mainfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
+sansfont = "CoreSansA45.ttf"
+sansfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
 # You can get these fonts here: https://fonts.google.com/selection?query=noto+color+
-mainfont = "Noto Serif"
-sansfont = "Noto Sans"
 monofont = "Noto Sans Mono"
 mainfontfallback = ["Noto Color Emoji:mode=harf"]
 sansfontfallback = ["Noto Color Emoji:mode=harf"]
 monofontfallback = [
   "Noto Color Emoji:mode=harf",
 ]
+linkcolor = "Links"
+urlcolor = "Links"
 urlstyle = "rm"
 documentclass = "book"
-fontsize = "11pt"
+fontsize = "10pt"
 geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.8cm,right=2.5cm"
 header-includes = [
+  "\\definecolor{Links}{HTML}{6200EE}",
   # Reduce font size of code blocks
   "\\DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\\\\{\\},fontsize=\\small}",
 ]
@@ -95,15 +119,25 @@ standalone = true
 metadata-file = "metadata.yml"
 
 [output.pandoc.profile.html.variables]
+mainfont = "CoreSansA45.ttf"
+mainfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
+sansfont = "CoreSansA45.ttf"
+sansfontoptions = [
+  "BoldFont=CoreSansA65.ttf",
+  "ItalicFont=CoreSansA45It.ttf",
+  "BoldItalicFont=CoreSansA65It.ttf",
+]
 # You can get these fonts here: https://fonts.google.com/selection?query=noto+color+
-mainfont = "Noto Serif"
-sansfont = "Noto Sans"
 monofont = "Noto Sans Mono"
 mainfontfallback = ["Noto Color Emoji:mode=harf"]
 sansfontfallback = ["Noto Color Emoji:mode=harf"]
 monofontfallback = [
   "Noto Color Emoji:mode=harf",
 ]
-linkcolor = "blue"
-urlcolor = "blue"
+linkcolor = "Links"
+urlcolor = "Links"
 urlstyle = "rm"
diff --git a/book/custom.theme b/book/custom.theme
new file mode 100644
index 0000000..b839db3
--- /dev/null
+++ b/book/custom.theme
@@ -0,0 +1,211 @@
+{
+    "text-color": "#c9d1d9",
+    "background-color": "#343942",
+    "line-number-color": null,
+    "line-number-background-color": null,
+    "text-styles": {
+        "Alert": {
+            "text-color": "#ff0000",
+            "background-color": null,
+            "bold": true,
+            "italic": false,
+            "underline": false
+        },
+        "Annotation": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": true,
+            "italic": true,
+            "underline": false
+        },
+        "Attribute": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "BaseN": {
+            "text-color": "#a5d6ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "BuiltIn": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Char": {
+            "text-color": "#a5d6ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Comment": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": false,
+            "italic": true,
+            "underline": false
+        },
+        "CommentVar": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": true,
+            "italic": true,
+            "underline": false
+        },
+        "Constant": {
+            "text-color": "#79c0ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "ControlFlow": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": true,
+            "italic": false,
+            "underline": false
+        },
+        "DataType": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "DecVal": {
+            "text-color": "#79c0ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Documentation": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": false,
+            "italic": true,
+            "underline": false
+        },
+        "Error": {
+            "text-color": "#ff0000",
+            "background-color": null,
+            "bold": true,
+            "italic": false,
+            "underline": false
+        },
+        "Extension": {
+            "text-color": null,
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Float": {
+            "text-color": "#79c0ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Function": {
+            "text-color": "#d2a8ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Import": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": true,
+            "italic": false,
+            "underline": false
+        },
+        "Information": {
+            "text-color": "#8b949e",
+            "background-color": null,
+            "bold": true,
+            "italic": true,
+            "underline": false
+        },
+        "Keyword": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": true,
+            "italic": false,
+            "underline": false
+        },
+        "Operator": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Other": {
+            "text-color": "#007020",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Preprocessor": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "SpecialChar": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "SpecialString": {
+            "text-color": "#03DAC5",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "String": {
+            "text-color": "#a5d6ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Variable": {
+            "text-color": "#a8daff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "VerbatimString": {
+            "text-color": "#a5d6ff",
+            "background-color": null,
+            "bold": false,
+            "italic": false,
+            "underline": false
+        },
+        "Warning": {
+            "text-color": "#60a0b0",
+            "background-color": null,
+            "bold": true,
+            "italic": true,
+            "underline": false
+        }
+    }
+}