There has been data ("Resumen de "La Semana Laboral de 4 Horas: No Hace Falta Trabajar Mas", De Timothy Ferriss: (The 4 Hour Workweek) (Spanish Edition)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Sun Jul 28 07:02:06 2019, so the data displayed here has been removed .