diff --git a/lib/post.js b/lib/post.js
index 161b913..f491f0e 100644
--- a/lib/post.js
+++ b/lib/post.js
@@ -23,14 +23,22 @@ function fetchStories(modifier, value, latest, cb) {
 	}
 
 	request(url, function (err, res) {
-		if (!err && res.statusCode == 200) {
+		if (err) {
+			cb(err);
+		} else if (res.statusCode == 200) {
 			// Strip out while(1) prepended to res
-			var data = JSON.parse(res.body.replace('])}while(1);</x>', ''));
-			cb(data);
-			// statusCode is 404 if the user doesn't exist
+			var data;
+			try {
+				data = JSON.parse(res.body.replace('])}while(1);</x>', ''));
+			} catch (parseError) {
+				cb(parseError);
+				return;
+			}
+			cb(null, data);
 		} else if (res.statusCode == 404) {
-			console.log(value + ' is not a valid Medium author.');
-			process.exit(1);
+			cb(new Error(value + ' is not a valid Medium author.'));
+		} else {
+			cb(new Error('Medium returned HTTP ' + res.statusCode));
 		}
 	});
 }
@@ -125,9 +133,9 @@ function processContent(data, modifier, count) {
 function getStories(modifier, options) {
 	var deferred = Q.defer();
 	var value = options.value, latest = options.latest;
-	getContent(modifier, value, latest, function (res) {
-		if (!res) {
-			return deferred.reject();
+	getContent(modifier, value, latest, function (err, res) {
+		if (err) {
+			return deferred.reject(err);
 		}
 		var posts = processContent(res, modifier, options.count);
 		deferred.resolve(posts);