Download selected files in a Views with entities that have a few files attached to each of them

I have a content type "ebook" and it has two fields for attached files: EPUB and MOBI. I created a views with 4 columns: 1. Ebook title, 2. MOBI file, 3. EPUB file, 4. Checkbox (VBO, download file). But when I select the checkbox and try to download both files for each ebook, only one of them is downloaded... Is there a way to download all of them?