public function onSearchStart(SearchEvent $event)
{
$input = $event->getInput();
$query = $input->getArgument('query');
$this->parser->freeOnly = $input->getOption('free');
$this->parser->maxPages = $input->getOption('pages');
$books = $this->parser->searchBooks($event->getProgressBar(), $query);
$event->setBooks($books);
}
