diff --git a/src/DataParser.php b/src/DataParser.php
index 53d92a9..189113d 100644
--- a/src/DataParser.php
+++ b/src/DataParser.php
@@ -49,13 +49,15 @@ class DataParser
         $books = $document->find('#search .authorAllBooks__single');
 
         $booksInfo = [];
-        foreach ($books as $book) {
-            $bookInfo = new Info();
-            $bookInfo->title = trim($book->first('.authorAllBooks__singleTextTitle')->text());
-            $bookInfo->author = trim($book->first('.authorAllBooks__singleTextAuthor')->text());
-            $bookInfo->url = $book->first('button[data-book-url]')->getAttribute('data-book-url');
-            $bookInfo->cover_url = $this->generateCoverUrls($book->first('.img-fluid')->getAttribute('data-src'));
-            $booksInfo[] = $bookInfo;
+        if ($document->has('#searchksiazki')) {
+            foreach ($books as $book) {
+                $bookInfo = new Info();
+                $bookInfo->title = trim($book->first('.authorAllBooks__singleTextTitle')->text());
+                $bookInfo->author = trim($book->first('.authorAllBooks__singleTextAuthor')->text());
+                $bookInfo->url = $book->first('button[data-book-url]')->getAttribute('data-book-url');
+                $bookInfo->cover_url = $this->generateCoverUrls($book->first('.img-fluid')->getAttribute('data-src'));
+                $booksInfo[] = $bookInfo;
+            }
         }
         return $booksInfo;
     }