There has been data ("Pimsleur Chinese (Mandarin) Level 4 MP3: Learn to Speak and Understand Mandarin Chinese with Pimsleur Language Programs (Comprehensive) (Chinese and English Edition)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Mon Oct 7 12:53:21 2019, so the data displayed here has been removed .