I tried, and I failed. Mad props to those who wrote graphQL

server/handler.js

@@ -7,6 +7,24 @@ const handler = {
 	Book: scalars => {
 		//takes an array of scalar types as objects: { typeName: 'String', name: 'title' }
 		//must return an array of objects containing the results
+
+		return database.books.map(b => {
+			const ret = {};
+
+			if (scalars.some(s => s.name == 'title')) {
+				ret.title = b.title;
+			}
+
+			if (scalars.some(s => s.name == 'author')) {
+				ret.author = b.author;
+			}
+
+			if (scalars.some(s => s.name == 'published')) {
+				ret.published = b.published;
+			}
+
+			return ret;
+		});
 	},
 
 	Author: scalars => {