There has been data ("Summary - Extreme Ownership: By Jocko Willink & Leif Babin - How U.S. Navy SEALs Lead and Win (Extreme Ownership: A Full Book Summary - Book, Paperback, Hardcover, Summary)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Sat Jan 4 18:47:03 2020, so the data displayed here has been removed .