diff --git a/blog/config.toml b/blog/config.toml
index 7fc83ae9..28bae2c9 100644
--- a/blog/config.toml
+++ b/blog/config.toml
@@ -1,5 +1,6 @@
 title = "Writing an OS in Rust"
 base_url = "https://os.phil-opp.com"
+description = "This blog series creates a small operating system in the Rust programming language. Each post is a small tutorial and includes all needed code, so you can follow along if you like."
 
 highlight_code = true
 highlight_theme = "visual-studio-dark"
diff --git a/blog/content/second-edition/extra/building-on-android/index.md b/blog/content/second-edition/extra/building-on-android/index.md
index 7d0d362a..9bdf0ef5 100644
--- a/blog/content/second-edition/extra/building-on-android/index.md
+++ b/blog/content/second-edition/extra/building-on-android/index.md
@@ -6,6 +6,8 @@ weight = 3
 
 I finally managed to get `blog_os` building on my Android phone using [termux](https://termux.com/). This post explains the necessary steps to set it up.
 
+<!-- more -->
+
 <img src="building-on-android.png" alt="Screenshot of the compilation output from android" style="height: 50rem;" >
 
 
diff --git a/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-red-zone/index.md b/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-red-zone/index.md
index 023e0af3..212ccb97 100644
--- a/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-red-zone/index.md
+++ b/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-red-zone/index.md
@@ -10,6 +10,8 @@ The [red zone] is an optimization of the [System V ABI] that allows functions to
 [red zone]: http://eli.thegreenplace.net/2011/09/06/stack-frame-layout-on-x86-64#the-red-zone
 [System V ABI]: http://wiki.osdev.org/System_V_ABI
 
+<!-- more -->
+
 ![stack frame with red zone](red-zone.svg)
 
 The image shows the stack frame of a function with `n` local variables. On function entry, the stack pointer is adjusted to make room on the stack for the return address and the local variables.
diff --git a/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-simd/index.md b/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-simd/index.md
index da46183f..6fe2f8d8 100644
--- a/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-simd/index.md
+++ b/blog/content/second-edition/posts/02-minimal-rust-kernel/disable-simd/index.md
@@ -9,6 +9,8 @@ template = "second-edition/extra.html"
 
 [Single Instruction Multiple Data (SIMD)]: https://en.wikipedia.org/wiki/SIMD
 
+<!-- more -->
+
 - [MMX]: The _Multi Media Extension_ instruction set was introduced in 1997 and defines eight 64 bit registers called `mm0` through `mm7`. These registers are just aliases for the registers of the [x87 floating point unit].
 - [SSE]: The _Streaming SIMD Extensions_ instruction set was introduced in 1999. Instead of re-using the floating point registers, it adds a completely new register set. The sixteen new registers are called `xmm0` through `xmm15` and are 128 bits each.
 - [AVX]: The _Advanced Vector Extensions_ are extensions that further increase the size of the multimedia registers. The new registers are called `ymm0` through `ymm15` and are 256 bits each. They extend the `xmm` registers, so e.g. `xmm0` is the lower half of `ymm0`.
diff --git a/blog/templates/second-edition/base.html b/blog/templates/second-edition/base.html
index 35247461..5ff4e0b2 100644
--- a/blog/templates/second-edition/base.html
+++ b/blog/templates/second-edition/base.html
@@ -6,7 +6,7 @@
     <meta charset="UTF-8">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <meta name="description" content="{{ config.description }}">
+    <meta name="description" content="{% block description %}{{ config.description }}{% endblock description %}">
     <meta name="author" content="{{ config.extra.author.name }}">
 
     {% if current_url %}
diff --git a/blog/templates/second-edition/extra.html b/blog/templates/second-edition/extra.html
index 0926bcd2..105ff0be 100644
--- a/blog/templates/second-edition/extra.html
+++ b/blog/templates/second-edition/extra.html
@@ -4,6 +4,10 @@
 
 {% block title %}{{ page.title }} | {{ config.title }}{% endblock title %}
 
+{% block description -%}
+{{ page.summary | safe | striptags }}
+{%- endblock description %}
+
 {% block main %}
     <h1>{{ page.title }}</h1>
     {{ page.content | safe }}
diff --git a/blog/templates/second-edition/page.html b/blog/templates/second-edition/page.html
index 94000b8f..4cc78136 100644
--- a/blog/templates/second-edition/page.html
+++ b/blog/templates/second-edition/page.html
@@ -7,6 +7,10 @@
     <aside id="all-posts-link"><a href="{{ config.base_url | safe }}" title="All Posts">« All Posts</a></aside>
 {% endblock header %}
 
+{% block description -%}
+{{ page.summary | safe | striptags }}
+{%- endblock description %}
+
 {% block main %}
     <h1>{{ page.title }}</h1>
     <time datetime="{{ page.date | date(format="%Y-%m-%d") }}" class="post-date">