diff --git a/books/free-programming-books-subjects.md b/books/free-programming-books-subjects.md
index 3e76c8266..7020ac59b 100644
--- a/books/free-programming-books-subjects.md
+++ b/books/free-programming-books-subjects.md
@@ -178,7 +178,7 @@ Books that cover a specific programming language can be found in the  [BY PROGRA
 * [Distributed Systems 3rd edition](https://www.distributed-systems.net/index.php/books/ds3/) - Maarten van Steen, Andrew S. Tanenbaum *(email address required)*
 * [How to optimize storage costs using Amazon S3](https://aws.amazon.com/s3/cloud-storage-cost-optimization-ebook/) - AWS (PDF)
 * [Kubernetes Hardening Guidance](https://media.defense.gov/2021/Aug/03/2002820425/-1/-1/1/CTR_KUBERNETESHARDENINGGUIDANCE.PDF) - NSA, CISA (PDF)
-* [Learn Azure in a Month of Lunches](https://azure.microsoft.com/mediahandler/files/resourcefiles/learn-azure-in-a-month-of-lunches/Learn_Azure_in_a_Month_of_Lunches.pdf) - Iain Foulds (PDF)
+* [Learn Azure in a Month of Lunches](https://clouddamcdnprodep.azureedge.net/gdc/2014519/original) - Iain Foulds (PDF)
 * [Monitoring Modern Infrastructure](https://www.datadoghq.com/ebook/monitoring-modern-infrastructure/) *(account required)*
 * [Multi-tenant Applications for the Cloud, 3rd Edition](http://www.microsoft.com/en-us/download/details.aspx?id=29263)
 * [OpenStack Operations Guide](https://docs.openstack.org/ops-guide/index.html)