diff --git a/books/architecture/src/storage/common/service/shutdown.md b/books/architecture/src/storage/common/service/shutdown.md
index cfe83db..4f9890e 100644
--- a/books/architecture/src/storage/common/service/shutdown.md
+++ b/books/architecture/src/storage/common/service/shutdown.md
@@ -1 +1,4 @@
-# 🟢 Shutdown
+# Shutdown
+Once the read/write handles to the `tower::Service` are `Drop`ed, the backing thread(pool) will gracefully exit, automatically.
+
+Note the writer thread and reader threadpool aren't connected whatsoever; dropping the write handle will make the writer thread exit, however, the reader handle is free to be held onto and can be continued to be read from - and vice-versa for the write handle.