2 files changed, 15 insertions, 11 deletions
diff --git a/lib/output/base.js b/lib/output/base.js
index 6ac3d7e..987179a 100644
--- a/lib/output/base.js
+++ b/lib/output/base.js
@@ -5,6 +5,7 @@ var path = require('path');
 var Promise = require('../utils/promise');
 var PluginsManager = require('../plugins');
 var TemplateEngine = require('../template');
+var gitbook = require('../gitbook');
 
 /*
 Output is like a stream interface for a parsed book
@@ -117,6 +118,11 @@ Output.prototype.onAsset = function(filename) {
 
 };
 
+// Finish the generation
+Output.prototype.finish = function() {
+
+};
+
 // Resolve an HTML link
 Output.prototype.onRelativeLink = function(currentPage, href) {
     var to = this.book.getPage(href);
@@ -146,13 +152,16 @@ Output.prototype.onResolveTemplate = function(from, to) {
     return path.resolve(path.dirname(from), to);
 };
 
-// Finish the generation
-Output.prototype.finish = function() {
-
-};
 
-Output.createMixin = function(def) {
+// ---- Utilities ----
 
+Output.prototype.getPageContext = function(page) {
+    return _.extend(
+        page.getContext(),
+        gitbook.getContext(),
+        this.book.getContext(),
+        this.book.summary.getContext()
+    );
 };
 
 module.exports = Output;
diff --git a/lib/output/json.js b/lib/output/json.js
index c4317c9..4fb3bbf 100644
--- a/lib/output/json.js
+++ b/lib/output/json.js
@@ -1,5 +1,4 @@
 var _ = require('lodash');
-var gitbook = require('../gitbook');
 var conrefsLoader = require('./conrefs');
 
 var JSONOutput = conrefsLoader();
@@ -18,11 +17,7 @@ JSONOutput.prototype.onPage = function(page) {
 
     // Write as json
     .then(function() {
-        var json = _.extend(
-            page.getContext(),
-            gitbook.getContext(),
-            that.book.getContext()
-        );
+        var json = that.getPageContext(page);
 
         return that.writeFile(
             page.withExtension('.json'),