diff --git a/essentials-of-compilation/python.pdf b/essentials-of-compilation/python.pdf
new file mode 100644
index 0000000..e8bf03c
--- /dev/null
+++ b/essentials-of-compilation/python.pdf
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e58f46220504ce9f568d45f2acd6f3267f9041f80c882d60a4bf00ea2e936fd7
+size 1435506
diff --git a/essentials-of-compilation/racket.pdf b/essentials-of-compilation/racket.pdf
new file mode 100644
index 0000000..6cbd4f6
--- /dev/null
+++ b/essentials-of-compilation/racket.pdf
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f152f7faca1e1678b1c6d6dfc2c94dcf5d4aadecd3de548aa09063b30ee53b47
+size 1439626