diff --git a/book/.gitignore b/book/.gitignore
new file mode 100644
index 00000000..7585238e
--- /dev/null
+++ b/book/.gitignore
@@ -0,0 +1 @@
+book
diff --git a/book/Makefile b/book/Makefile
new file mode 100644
index 00000000..4d8ab123
--- /dev/null
+++ b/book/Makefile
@@ -0,0 +1,3 @@
+PORT := $(shell printf "%d" 0xbeee)
+serve:
+	mdbook serve -p $(PORT)
diff --git a/book/book.toml b/book/book.toml
new file mode 100644
index 00000000..1d281ceb
--- /dev/null
+++ b/book/book.toml
@@ -0,0 +1,6 @@
+[book]
+authors = ["Nicolas Stalder"]
+language = "en"
+multilingual = false
+src = "src"
+title = "Solo 🐝"
diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
new file mode 100644
index 00000000..3a51bfe2
--- /dev/null
+++ b/book/src/SUMMARY.md
@@ -0,0 +1,6 @@
+# Summary
+
+- [Chapter 1](./chapter_1.md)
+
+- [Getting Started](getting-started/README.md)
+    - [Raspberry Pi 4B](getting-started/rpi.md)
diff --git a/book/src/chapter_1.md b/book/src/chapter_1.md
new file mode 100644
index 00000000..b743fda3
--- /dev/null
+++ b/book/src/chapter_1.md
@@ -0,0 +1 @@
+# Chapter 1
diff --git a/book/src/getting-started/README.md b/book/src/getting-started/README.md
new file mode 100644
index 00000000..37207e8e
--- /dev/null
+++ b/book/src/getting-started/README.md
@@ -0,0 +1,4 @@
+# Getting Started
+
+Development mainly happens on Arch Linux and macOS, besides that GitHub Actions runs on Ubuntu,
+and we do CI builds for Windows (which is Windows Server 2019).
diff --git a/book/src/getting-started/rpi.md b/book/src/getting-started/rpi.md
new file mode 100644
index 00000000..451ebba6
--- /dev/null
+++ b/book/src/getting-started/rpi.md
@@ -0,0 +1,36 @@
+# Raspberry Pi 4B
+
+The intent of this platform is to be a driver for CI, that is, run a self-hosted GitHub Actions runner.
+
+The firmware would then be compiled on GitHub's usual Ubuntu CI servers, and just the built artifact
+transfered for functional HIL testing.
+
+We use Arch Linux for its wide collection of up-to-date packages, and the ease of building one's one
+(e.g., we'll want to package up our own `lpc55-host`).
+
+- [Install Arch on a MicroSD card](https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-4) 
+(AArch64 works fine, don't forget the last `sed` step, make sure you're not in the RPi3 section).
+- If network doesn't come up reliably (`networkctl` shows `eth0` as `Configuring`), you can fix manually
+with `networkctl down eth0`, `networkctl up eth0`, but 
+[this change to mkinitcpio.conf](https://github.com/raspberrypi/linux/issues/3108#issuecomment-723580334)
+also seems to work (early `systemd-networkd` journal entries indicate `eth0` can't be found).
+- No need to try to compile `ncurses5` to `arm-none-eabi-gdb` from <https://developer.arm.com/> to work: just use `gdb`!
+- For `jlink-software-and-documentation`, if it's not merged yet, apply a patch like 
+<https://aur.archlinux.org/packages/jlink-software-and-documentation#comment-786082>. It seems like not
+having a GUI suppresses `JLinkGDBServer`'s pop-up and confirmation attempts.
+
+## The Runner
+Install it as described in the Settings > Actions tab, then keep it running with:
+
+```
+[Unit]
+Description=GitHub Actions runner
+
+[Service]
+Type=simple
+ExecStart=/home/alarm/actions-runner/run.sh
+WorkingDirectory=/home/alarm/actions-runner
+
+[Install]
+WantedBy=default.target
+```