Dr. G.R. Evans 
Anselm [PDF ebook] 

St Anselm of Canterbury (1033-1109) was one of the greatest Christian writers of medieval Europe. Although best known as the inventor of the famous  »ontological argument » for God »s existence, his writings cover all the chief aspects of Christian doctrine and have been a major influence on western theology.
Equal to Anselm »s theology are his spiritual writings, which are alive with an understanding of the gentleness and mercy of a God who comes to meet humanity in its suffering and striving.
In this exceptional and authoritative study, Dr. Evans explores the full range of Anselm »s work, expertly placing both the theology and the devotional writings in context for the modern reader.