diff --git a/books/free-programming-books-bn.md b/books/free-programming-books-bn.md
index bbceff5ab..b2a1b5da3 100644
--- a/books/free-programming-books-bn.md
+++ b/books/free-programming-books-bn.md
@@ -91,4 +91,3 @@
 ### Git and Github
 
 * [এক পলকে গিট ও গিটহাব](https://with.zonayed.me/book/git-n-github-at-glance/) - Zonayed
-
diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 03e369448..81a772106 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -278,6 +278,7 @@ Books on general-purpose programming that don't focus on a specific language are
 
 ### APL
 
+* [A Programming Language](https://softwarepreservation.computerhistory.org/apl/book/APROGRAMMINGLANGUAGE.pdf) - Kenneth E. Iverson (PDF)
 * [APL2 at a glance](https://ia801009.us.archive.org/28/items/apl-2-at-a-glance-brown-pakin-polivka/APL2_at_a_Glance_-_Brown_Pakin_Polivka.pdf) - James A. Brown, Sandra Pakin, Raymond P. Polivka - 1988 (PDF)
 * [Introduction to College Mathematics with A Programming Language (1978)](https://softwarepreservation.computerhistory.org/apl/book/CollegeMathematicswithAPL.pdf) - E. J. LeCuyer (PDF)
 * [Learning APL](https://xpqz.github.io/learnapl) - Stefan Kruger (HTML,PDF,IPYNB)