From 351c271b86c7f9df6937459f5996da62f4caaf5e Mon Sep 17 00:00:00 2001
From: gsiri007 <216904534+gsiri007@users.noreply.github.com>
Date: Mon, 9 Feb 2026 18:45:22 +0530
Subject: [PATCH] Unable to access  -  A Primer on Design Patterns  (#13082)

* Removed 403 Forbidden - Object-Oriented Programming in JavaTM Textbook

* Book added: Linux Essentials - Linux Professional Institute

* three LPI books added

* version number removed from LPI books

* Operating Systems and Middleware - Max Hailperin removed due to 404 access denied

* removed broken link
---
 books/free-programming-books-subjects.md | 1 -
 1 file changed, 1 deletion(-)

diff --git a/books/free-programming-books-subjects.md b/books/free-programming-books-subjects.md
index 527e25dbd..237d44d96 100644
--- a/books/free-programming-books-subjects.md
+++ b/books/free-programming-books-subjects.md
@@ -947,7 +947,6 @@ Kerridge (PDF) (email address *requested*, not required)
 
 ### Software Architecture
 
-* [A Primer on Design Patterns](https://leanpub.com/aprimerondesignpatterns/read) - Rahul Batra (HTML)
 * [Agile Planning: From Ideas to Story Cards](https://launchschool.com/books/agile_planning) - Launch School
 * [Architectural Metapatterns: The Pattern Language of Software Architecture](https://github.com/denyspoltorak/publications/tree/main/ArchitecturalMetapatterns) - Denys Poltorak, `edt.:` Lars Noodén (PDF, EPUB, ODT) (CC BY)
 * [Architectural Styles and the Design of Network-based Software Architectures](https://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm) - Roy Thomas Fielding