The Perfect System of Parenting Audiobook is available at the following locations. Amazon.com Amazon.ca Audible.com Audiobooks.com Apple iTunes Kobo.com Google Play Hoopla Digital Scribd YouScribe.com Libro.fm Storytel.com Beek.io Bookmate.com BookBeat.com ChirpBooks.com eStories.com mofibo.com nextory.se uBook.com