diff --git a/README.md b/README.md
index b1403ed..1110a3a 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,6 @@ List of books in the tutorrio library and who has them on loan.
 | 978-1-449-37332-0 | Designing Data-Intensive Applications | Martin Kleppmann | --- |
 | 978-1-492-08689-5 | Software Architecture: The Hard Parts | Neal Ford        | Jelle Pelfrene |
 | 978-1-492-04345-4 | Fundamentals of Software Architecture: An Engineering Approach | Neal Ford | Dominique Chanet |
+| 978-93-325-7577-6 | Modern Operating Systems: 4th edition | Andrew S. Tanenbaum | --- |
+| 978-93-560-6360-0 | Computer Networks: 6th edition | Andrew S. Tanenbaum | --- |