Matti Yrjänä Joensuu was born on October 31, 1948 in Helsinki, Finland. He was a writer, known for Harjunpää ja pahan pappi (2010), Harjunpää ja heimolaiset (1995) and Harjunpää ja kiusantekijät (1993). He died on December 4, 2011 in Valkeakoski, Finland.