Harrison was known for numerous books and series, including The Stainless Steel Rat series, the Deathworld series, the Bill, the Galactic Hero series, Make Room, Make Room (the basis for the film Soylent Green), A Transatlantic Tunnel, Hurrah!, and many, many more.
Memorials may be left at this Harry Harrison News Blog.
[UPDATE] – Tor President and Publisher, Tom Doherty, had this to say:
“Harry Harrison was an illustrator, anthologist, critic; a writer of power and scope voted Grand Master by the Science Fiction and Fantasy Writers of America. He was published in 25 languages around the world.
In The Stainless Steel Rat and Bill, The Galactic Hero he created two of the great comic series of the genre. In Make Room! Make Room! he made us consider the consequences of over population and over consumption of the world’s resources. Before the term “steampunk” was coined he had written Transatlantic Tunnel, Hurrah!. He believed science fiction was important, that it caused people to think about our world and what it could become.
For over 40 years, he was my friend.”- Tom Doherty