app/book/book-list-by-first-letter.controller.js
'use strict';
angular.module('Cops.book')
.controller('bookListFirstLetterController', ['$scope', '$stateParams', 'Restangular', function($scope, $stateParams, Restangular) {
$scope.letters = [];
Restangular.one('databases', $stateParams.db)
.one('books', 'letter')
.getList()
.then(function(list) {
$scope.letters = list;
});
}]);