Joško Battestin (14 March 1918 – 21 September 2020) was a Slovene electrical engineer, inventor, physics teacher and author of a number of books on experiments in physics, many aimed at aiding the understanding of the subject by secondary school students. Amongst his publications is a book on graphology, expanding on the theories of Ludwig Klages that Battestin published in 2008 at the age of 91. In 1965 he won the Levstik Award for his book Mikroskop Pionir (The Pioneer Microscope). He turned 100 in March 2018. In September 2019, it was reported that Battestin, 101, lived in a care home for e