diff --git a/books/free-programming-books-subjects.md b/books/free-programming-books-subjects.md
index a846be4a1..7188bab7d 100644
--- a/books/free-programming-books-subjects.md
+++ b/books/free-programming-books-subjects.md
@@ -754,7 +754,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [Open source in Brazil](https://www.oreilly.com/ideas/open-source-in-brazil) - Andy Oram
 * [Producing Open Source Software](https://producingoss.com) - Karl Fogel
 * [Roads and Bridges: The Unseen Labor Behind Our Digital Infrastructure](https://www.fordfoundation.org/work/learning/research-reports/roads-and-bridges-the-unseen-labor-behind-our-digital-infrastructure/) - Nadia Eghbal
-* [The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Feerless Hacks](https://www.aosabook.org/en/index.html)
+* [The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Fearless Hacks](https://www.aosabook.org/en/index.html)
 * [The Art of Community](https://artofcommunityonline.org/Art_of_Community_Second_Edition.pdf) - Jono Bacon (PDF)
 * [The Cathedral and the Bazaar](http://www.catb.org/esr/writings/cathedral-bazaar/) - Eric S. Raymond
 * [The Future of the Internet](https://futureoftheinternet.org) - Jonathan Zittrain