The Back of the NapkinLast updated Sep 4, 2022 Edit SourceBook# The Back of the Napkin# Solving Problems and Selling Ideas with Pictures# AuthorDan Roam# Coverhttp://books.google.com/books/content?id=KjzZCwAAQBAJ&printsec=frontcover&img=1&zoom=1&edge=curl&source=gbs_api# Amazon Linkhttps://www.amazon.com/Back-Napkin-Expanded-Problems-Pictures/dp/1591842697# Website