Before permanent lunar encampments such as Clarke's Clavius Base (in 2001: A Space Odyssey) or Heinlein's Luna City (in The Moon Is a Harsh Mistress) could be built, there would have to be the first settlers-the first people to set up shop and try to eke out an existence on the Moon. Walking on the Sea of Clouds is the story of such lunar pioneers: two couples, Stormie and Frank Pastorelli and Van and Barbara Richards, determined...