diff --git a/free-programming-books-es.md b/free-programming-books-es.md
index 6e9dba93a5fe2014d3585cfa1d88fbd7a907dcf4..80ca13c0d55ccb36cdcd0957ec65df5b473c8d93 100644
--- a/free-programming-books-es.md
+++ b/free-programming-books-es.md
@@ -1,10 +1,15 @@
 ###Index
+* [Assembly Language](#assembly-language)
 * [Metalistas](#metalistas)
 * [Ensamblador](#ensamblador)
 * [Git](#git)
 * [Python](#python)
 * [Haskell](#haskell)
 
+
+###Assembly Language
+* [Machine Code for Beginners](http://www.worldofspectrum.org/infoseekid.cgi?id=2000227) (PDF) by Lisa Watts and Mike Wharton
+
 ###Metalistas
 
 * [¡Quiero Aprender Python! - Python Argentina](http://python.org.ar/AprendiendoPython)
diff --git a/free-programming-books.md b/free-programming-books.md
index 8f4902e8d04f9adf21a9b517c711283960c521ca..784ac1bdf3b683dbf14c78aa1e6299bd815ea76d 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -361,6 +361,9 @@
 * [x86 Assembly](http://en.wikibooks.org/wiki/X86_Assembly)
 * [Ralf Brown's Interrupt List](http://www.ctyme.com/rbrown.htm)
 
+####Non-X86
+* [Machine Code for Beginners](http://www.worldofspectrum.org/infoseekid.cgi?id=2000227) (PDF) by Lisa Watts and Mike Wharton
+
 
 ###Bash
 * [Advanced Bash-Scripting Guide](http://tldp.org/LDP/abs/html/)