A Life Too Short: The Tragedy of Robert Enke by Ronald Reng
Compulsive reading, describes how Enke battled depression over many years. His first severe bout in 2003 led to him leaving Fenerbahce without ever playing for them, and afterwards, he recovered from his illness to become Germany's first choice keeper. After having to cope with the death of his infant daughter and then suffering from injury, he suffered another bout of depression in 2009, and despite the support of his family and friends he took his own life in November that year. 9/10 for me and would thoroughly recommend it.