diff --git a/src/contentmanager.cpp b/src/contentmanager.cpp
index d5fb8f7..8c11b8a 100644
--- a/src/contentmanager.cpp
+++ b/src/contentmanager.cpp
@@ -505,15 +505,10 @@ void ContentManager::downloadBook(const QString &id)
         throwDownloadUnavailableError();
 
     const auto& book = getRemoteOrLocalBook(id);
+
     auto downloadPath = KiwixApp::instance()->getSettingsManager()->getDownloadDir();
     checkEnoughStorageAvailable(book, downloadPath);
 
-    auto booksList = mp_library->getBookIds();
-    for (auto b : booksList) {
-        if (b.toStdString() == book.getId())
-            throwDownloadUnavailableError(); // but why???
-    }
-
     std::shared_ptr<kiwix::Download> download;
     try {
         std::pair<std::string, std::string> downloadDir("dir", downloadPath.toStdString());