Luna is an open penal colony and the regime is a harsh one. Not surprisingly, revolution against the hated authority is planned. But the key figures in the revolt are an unlikely crew: Manuel Garcia O'Kelly, an engaging jack of all trades, the beautiful Wyoming Knott - and Mike, a lonely computer who likes to make up jokes ...

Robert A. Heinlein (1907-88) was educated at the University of Missouri and the US Naval College, Annapolis. He served as a naval officer but retired in 1934 due to ill health. He then studied physics at UCLA and worked in a number of jobs before beginning to publish sf in 1939. Among his many novels are Starship Troopers and Stranger in a Strange Land.