diff --git a/packages/bookshop/srv/cat-service.cds b/packages/bookshop/srv/cat-service.cds
index efe7b5d9..ecae2789 100644
--- a/packages/bookshop/srv/cat-service.cds
+++ b/packages/bookshop/srv/cat-service.cds
@@ -1,6 +1,7 @@
 using { sap.capire.bookshop as my } from '../db/schema';
 
 @path:'/browse'
+// @impl: './cat-service.js'
 service CatalogService {
 
   @readonly entity Books as SELECT from my.Books {*,
diff --git a/packages/bookshop/srv/cat-service.js b/packages/bookshop/srv/cat-service.js
index 9959aaf6..045188c3 100644
--- a/packages/bookshop/srv/cat-service.js
+++ b/packages/bookshop/srv/cat-service.js
@@ -5,18 +5,17 @@ const { Books } = cds.entities
 module.exports = cds.service.impl(srv => {
   srv.after ('READ', 'Books', each => each.stock > 111 && _addDiscount2(each,11))
   srv.before ('CREATE', 'Orders', _reduceStock)
-  // srv.before ('*', (req) => { console.debug ('>>>', req.method, req.target && req.target.name) })
+  // srv.before ('*', (req) => { console.debug ('>>>', req.method, req.target.name) })
 })
 
 /** Add some discount for overstocked books */
 function _addDiscount2 (each,discount) {
   each.title += ` -- ${discount}% discount!`
 }
-
 /** Reduce stock of ordered books if available stock suffices */
 async function _reduceStock (req) {
   const { Items: OrderItems } = req.data
-  // req.on('failed', () => {console.debug ('>>> failed for order', req.data.ID)})
+  // req.on('failed', () => { console.debug ('>>> failed for order', req.data.ID) })
 
   return cds.transaction(req) .run (()=> OrderItems.map (order =>
     UPDATE (Books) .set ('stock -=', order.amount)