public function create($data)
{
$newSeries = $this->getNew();
$newSeries->title = $data['title'];
$newSeries->slug = str_slug($data['slug']);
$newSeries->description = $data['description'];
$newSeries->image = $data['image'];
$newSeries->save();
$newSeries->categories()->sync($data['categories']);
return $this->findByIdWithRelation($newSeries->id, static::$relations)->toArray();
}