Add unit 3 content

packages/bookshop/srv/admin-service.cds

@@ -10,7 +10,7 @@ service AdminService @(_requires:'authenticated-user') {
 annotate AdminService.Orders with @odata.draft.enabled;
 // annotate AdminService.Books with @odata.draft.enabled;
 
-// Temporary workaround -> https://github.wdf.sap.corp/cap/issues/issues/3121
+// Temporary workaround -> cap/issues#3121
 extend service AdminService with {
   entity OrderItems as select from my.OrderItems;
 }

packages/bookshop/srv/cat-service.cds

@@ -3,9 +3,7 @@ using { sap.capire.bookshop as my } from '../db/schema';
 @path:'/browse'
 service CatalogService {
 
-  @readonly entity Books as SELECT from my.Books {*,
-    author.name as author
-  } excluding { createdBy, modifiedBy };
+  @readonly entity Books as SELECT from my.Books { * } excluding { createdBy, modifiedBy };
 
   @requires_: 'authenticated-user'
   @insertonly entity Orders as projection on my.Orders;