Johannes Kepler: Life and Letters was written as a biography of Johannes Kepler using his own letters. The letters extend over a period of time from 1596 to 1631 bringing to the reader Keplers personality rather than his scientific achievements. The book represents his youth and years of apprenticeship, marriage and First scholarly achievements, the imperial mathematics at the Court in Prague, the Difficult Years in Linz and the Oddessy of the last four years incompassing 1948 to 1951."