Further (sometimes, Furthur) was a 1939 International Harvester school bus purchased by author Ken Kesey in 1964 for $1,500 from Andre Hobson in Atherton, California. The bus was stripped down and remodeled inside and out for a psychedelic excursion across the country with Kesey and his Merry Pranksters on board. The bus was named by artist Roy Sebern, who painted the word “Furthur” (with two U's) on the destination placard as a kind of one-word poem and inspiration to keep going whenever the bus broke down.
Beat legend Neal Cassady was the driver of the famous bus on its original trip to New York for the publication of Kesey's new book, Sometimes a Great Notion. The trip was filmed by the Merry Pranksters, and this footage was used for the 2011 documentary film Magic Trip. Other Further trips included an anti-Vietnam war rally in 1966 and Woodstock in 1969.