Controller being called via HMVC

Dpublic function post_details() {
        if (! \Request::is_hmvc()) {
            \Log::debug('No HMVC');
            $data['id'] = \Input::post('id', FALSE);
        } else {
            \Log::Debug('HMVC');
            $data['id'] = $this->param('id');
        }
        \Log::Debug('DCMS API - Book: ' . $data['id']);
        if ($data['id'] !== FALSE && $data['id'] !== NULL) {
            \Log::debug('Retrieving book details - ID' . $data['id']);
            $books = \Model_Book::query()->where('id', $data['id'])->get();
            $details = array();
            foreach ($books as $book) {
                $details['title'] = $book->name;
                $details['author'] = array();
                foreach ($book->authors as $a) {
                    \Arr::insert($details['author'], $a->name,0);
                }
            }
            return $details;
        } else {
            \Log::Debug('Post was empty');
            $details['error'] = 'no_id_given';
            return $details;
        }
    }