Michael Hart "died on September 6, 2011 in his home in Urbana, Illinois, at the age of 64."
The following link is to an obituary which "is granted to the public domain by its author, Dr. Gregory B. Newby".
Hart was best known for his 1971 invention of electronic books, or eBooks. He founded Project Gutenberg, which is recognized as one of the earliest and longest-lasting online literary projects.
by the time of his death Project Gutenberg hosted eBooks in 60 different languages, and was frequently highlighted as one of the best Internet-based resources.