diff --git a/README.adoc b/README.adoc
index 4161ca7..7c5cdd6 100644
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+++ b/README.adoc
@@ -27840,6 +27840,7 @@ Runnable stuff:
 
 Theory:
 
+* http://cs241.cs.illinois.edu/coursebook/index.html "CS 241: System Programming" from the University of Illinois at Urbana-Champaign. Has a PDF, Tex source at: https://github.com/illinois-cs241/coursebook TODO any runnable code?
 * https://github.com/0xAX/linux-insides wait, how come they have 10x more starts as this repo? :-) Just kidding, awesome effort.
 * http://nairobi-embedded.org you will fall here a lot when you start popping the hard QEMU Google queries. They have covered everything we do here basically, but with a more manual approach, while this repo automates everything.
 +