diff --git a/basics_dev/devel-books.md b/basics_dev/devel-books.md
index 8f738a5f..1b292a76 100644
--- a/basics_dev/devel-books.md
+++ b/basics_dev/devel-books.md
@@ -11,14 +11,14 @@ redirect_from:
 Below is a list of various books that might be useful in learning some basics needed for Qubes development.
 
 -   A must-read about Xen internals:
-    -   [http://www.amazon.com/Definitive-Guide-Xen-Hypervisor/dp/013234971X](http://www.amazon.com/Definitive-Guide-Xen-Hypervisor/dp/013234971X)
+    -   [https://www.amazon.com/Definitive-Guide-Xen-Hypervisor/dp/013234971X](https://www.amazon.com/Definitive-Guide-Xen-Hypervisor/dp/013234971X)
 
 -   Some good books about Linux kernel:
-    -   [http://www.amazon.com/Linux-Kernel-Development-Robert-Love/dp/0672327201](http://www.amazon.com/Linux-Kernel-Development-Robert-Love/dp/0672327201)
-    -   [http://www.amazon.com/Linux-Device-Drivers-Jonathan-Corbet/dp/0596005903](http://www.amazon.com/Linux-Device-Drivers-Jonathan-Corbet/dp/0596005903)
+    -   [https://www.amazon.com/Linux-Kernel-Development-Robert-Love/dp/0672329468](https://www.amazon.com/Linux-Kernel-Development-Robert-Love/dp/0672329468]
+    -   [https://www.amazon.com/Linux-Device-Drivers-Jonathan-Corbet/dp/0596005903](https://www.amazon.com/Linux-Device-Drivers-Jonathan-Corbet/dp/0596005903)
 
 -   Solid intro into Trusted Computing by David Grawrock (original Intel architect for TXT):
-    -   [http://www.amazon.com/Dynamics-Trusted-Platform-Buildin-Grawrock/dp/1934053082](http://www.amazon.com/Dynamics-Trusted-Platform-Buildin-Grawrock/dp/1934053082)
+    -   [https://www.amazon.com/Dynamics-Trusted-Platform-Buildin-Grawrock/dp/1934053082](https://www.amazon.com/Dynamics-Trusted-Platform-Buildin-Grawrock/dp/1934053082)
 
 -   Good book about GIT:
     -   [http://progit.org/book/](http://progit.org/book/)