404 access denied - Operating Systems and Middleware by Max Hailperin (#13021)

* 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

Author: gsiri007

books/free-programming-books-subjects.md

@@ -789,7 +789,6 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [How to write a simple operating system in assembly language](https://mikeos.sourceforge.net/write-your-own-os.html) - Mike Saunders (HTML)
 * [Linux Kernel in a Nutshell](http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration) - Greg Kroah-Hartman (HTML)
 * [Making Servers Work: A Practical Guide to Linux System Administration](https://www.digitalocean.com/community/books/sysadmin-ebook-making-servers-work) - Jamon Camisso (PDF, EPUB)
-* [Operating Systems and Middleware](https://gustavus.edu/mcs/max/os-book/) - Max Hailperin (PDF, LaTeX)
 * [Operating Systems: From 0 to 1](https://github.com/tuhdo/os01/releases/tag/0.0.1) - Tu, Ho Doang (PDF) ( :construction: *in process*)
 * [Operating Systems: Three Easy Pieces](https://pages.cs.wisc.edu/~remzi/OSTEP/) - Remzi H. Arpaci-Dusseau and Andrea C. Arpaci-Dusseau (PDF)
 * [Practical File System Design: The Be File System](https://www.nobius.org/~dbg/practical-file-system-design.pdf) - Dominic Giampaolo (PDF)