Worked on the schema code

server/database.js

@@ -21,7 +21,7 @@ let authors = [
 	},
 ];
 
-//insert the authors into the books
+//insert the authors into the books (relationship)
 authors = authors.map(a => {
 	a.books = a.books.map(b => {
 		b.author = a;
@@ -39,4 +39,4 @@ authors.forEach(a => books = books.concat(a.books));
 module.exports = {
 	authors,
 	books,
-};
+};