Michael Levy was one of the good guys and one of the major contributors to the academic study of sf. He was a regular at the International Conference on the Fantastic in the Arts (when he wasn’t there this year, we knew something was wrong), and he wrote lotsa reviews (for NYRSF, among others). One of his final contributions was Children’s Fantasy Literature, a historical study written with Farah Mendlesohn, which I recommend wholeheartedly to anyone interested in the topic.