diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 94d72d0829bf2..06dc2958776a7 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1552,17 +1552,14 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Common Lisp the Language, 2nd Edition](http://www.cs.cmu.edu/Groups/AI/html/cltl/mirrors.html)
 * [Google's Common Lisp Style Guide](https://google.github.io/styleguide/lispguide.xml)
 * [Interpreting LISP](http://www.civilized.com/files/lispbook.pdf) - Gary D. Knott (PDF)
-* [Learn Lisp The Hard Way](https://github.com/LispTO/llthw) - Colin J.E. Lupton
+* [Interpreting LISP](http://www.civilized.com/files/lispbook.pdf) - Gary D. Knott (PDF)
+* [Introduction to newLISP](https://en.wikibooks.org/wiki/Introduction_to_newLisp) - Lutz Mueller (HTML)
 * [Let Over Lambda - 50 Years of Lisp](http://letoverlambda.com/index.cl/) - D. Hoyte
 * [Lisp Hackers: Interviews with 100x More Productive Programmers](https://leanpub.com/lisphackers/read) - Vsevolod Dyomkin (HTML)
 * [Lisp Koans](https://github.com/google/lisp-koans)
 * [Lisp Web Tales](https://leanpub.com/lispwebtales) - Pavel Penev
 * [Loving Common Lisp, or the Savvy Programmer's Secret Weapon](https://leanpub.com/lovinglisp/read) - Mark Watson (HTML)
 * [On Lisp](http://www.paulgraham.com/onlisp.html) - P. Graham
-* [Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp](https://github.com/norvig/paip-lisp) - Peter Norvig (PDF, EPUB, Markdown)
-* [Practical Common Lisp](http://www.gigamonkeys.com/book/) - P. Seibel
-* [The Common Lisp Cookbook](https://lispcookbook.github.io/cl-cookbook/)
-* [The Evolution of Lisp](http://www.dreamsongs.com/Files/HOPL2-Uncut.pdf) - Guy L. Steele Jr., Richard P. Gabriel (PDF)
 
 
 #### Emacs Lisp