diff --git a/task04/README.md b/task04/README.md
new file mode 100644
index 0000000..93c9324
--- /dev/null
+++ b/task04/README.md
@@ -0,0 +1,15 @@
+# Getting started
+
+This task is about Spring HATEOAS and Spring REST Docs.
+
+TODO 01 - 03 deal with Spring HATEOAS. Add the missing links. The TODO comments explain which links you should add.
+
+For the second part of this task edit the `InvoiceAPITest` file. Additional to that have a look at the file `all_invoices.doc`. 
+Execute `maven install` and look at the file in `target/generated-docs/index.html` to see the result. (TODO 04 - 07)
+
+
+
+
+
+
+
diff --git a/task04/src/test/java/de/hststuttgart/vs/task04/api/v1/InvoiceAPITest.java b/task04/src/test/java/de/hststuttgart/vs/task04/api/v1/InvoiceAPITest.java
index 99419b2..ce436d4 100644
--- a/task04/src/test/java/de/hststuttgart/vs/task04/api/v1/InvoiceAPITest.java
+++ b/task04/src/test/java/de/hststuttgart/vs/task04/api/v1/InvoiceAPITest.java
@@ -134,6 +134,7 @@ class InvoiceAPITest {
                         ),
                         responseFields(
                                 fieldWithPath("invoices").description("Array that contains all invoices"),
+                                fieldWithPath("invoices[].invoiceId").description("Id of an invoice"),
                                 subsectionWithPath("_links").description("Link to resources")
                         )
                 ));