diff --git a/books/architecture/a b/books/architecture/a new file mode 100644 index 0000000..e69de29 diff --git a/books/protocol/a b/books/protocol/a new file mode 100644 index 0000000..e69de29 diff --git a/books/user/a b/books/user/a new file mode 100644 index 0000000..e69de29