diff --git a/.gitmodules b/.gitmodules
index 97a1b78..e88b448 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,3 +2,7 @@
 	path = book-monads
 	url = https://gitea.parrrate.ru/PTV/book-monads.git
 	branch = latest
+[submodule "book-radn"]
+	path = book-radn
+	url = https://gitea.parrrate.ru/PTV/book-radn.git
+	branch = latest
diff --git a/book-monads b/book-monads
index ec6b0dc..a4e6c75 160000
--- a/book-monads
+++ b/book-monads
@@ -1 +1 @@
-Subproject commit ec6b0dcf5aa9ae47ec28bd5db959811d23102904
+Subproject commit a4e6c75644ce6fe6635680f144df148e0ae6f794
diff --git a/book-radn b/book-radn
new file mode 160000
index 0000000..c33989e
--- /dev/null
+++ b/book-radn
@@ -0,0 +1 @@
+Subproject commit c33989ee8688d3dc1cba629069be4ee2ba6d3793