Add link to bookshelf app

README.md

@@ -44,6 +44,8 @@ Example Applications
 
 - [`BigQueryExample`](https://github.com/GoogleCloudPlatform/gcloud-java/blob/master/gcloud-java-examples/src/main/java/com/google/gcloud/examples/BigQueryExample.java) - A simple command line interface providing some of Cloud BigQuery's functionality
   - Read more about using this application on the [`gcloud-java-examples` docs page](http://googlecloudplatform.github.io/gcloud-java/apidocs/?com/google/gcloud/examples/BigQueryExample.html).
+- [`Bookshelf`](https://github.com/GoogleCloudPlatform/getting-started-java/tree/master/bookshelf) - An App Engine app that manages a virtual bookshelf.
+  - This app uses `gcloud-java` to interface with Cloud Datastore and Cloud Storage. It also uses Cloud SQL, another Google Cloud Platform service.
 - [`DatastoreExample`](https://github.com/GoogleCloudPlatform/gcloud-java/blob/master/gcloud-java-examples/src/main/java/com/google/gcloud/examples/DatastoreExample.java) - A simple command line interface for the Cloud Datastore
   - Read more about using this application on the [`gcloud-java-examples` docs page](http://googlecloudplatform.github.io/gcloud-java/apidocs/?com/google/gcloud/examples/DatastoreExample.html).
 - [`ResourceManagerExample`](https://github.com/GoogleCloudPlatform/gcloud-java/blob/master/gcloud-java-examples/src/main/java/com/google/gcloud/examples/ResourceManagerExample.java) - A simple command line interface providing some of Cloud Resource Manager's functionality