title: Earth Magnetism: A Guided Tour through Magnetic Fields (Complementary Science)
author:  Wallace H. Campbell 
description: From the Reviews<br>"This layman's non-technical description of the Earth's magnetic field is long overdue. Dr. Campbell has done an excellent job of not only describing the scientific nature of this area of science, but also puts the understanding at the level of the majority of the public."<br>--Joe Hirman, Chief Forecaster, Space Environment Forecast Center, NOAA<br><br>"This book is written by a world-renowned scientist and provides a wealth of scientific information about magnetic fields, in a way that is state-of-the-science yet fun to read. Dr. Campbell carries an unbridled enthusiasm for geomagnetism, which he is willing and able to share with scientists and non-scientists alike, and he does it with superb clarity, simplicity and practicality." <br>--Herbert W. Kroehl, Secretary General, International Association for Geomagnetism and Aeronomy
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  “Maybe there’s something magnetic going on,” Bobbie Ray told them. “Something
  in the ionosphere. You hear about it all the time.”
  
  Nev Reoh was nodding in support, still anxiously looking to the sky as if to
  expect the cadet ship to suddenly appear overhead.
  
  But Reeves shook his head. “You helped deploy the satellites. This planet has
  a very weak magnetic field because it’s no longer tectonically active.”
  
  “Well, it’s got to be
  
  
  _something,”_ Bobbie Ray insisted. “Excited electrons in the stratosphere, or
  solar flares. We just have to wait for it to subside and they’ll come get us.”
  
  Now both Reeves and Ijen were looking at him, their expressions dull from lack
  of sleep. “If we don’t get more water soon,” Reeves said, “we’ll be dead
  before that happens. We’ve explored as far as we dare to go alone, and we
  can’t leave Puller–”
  
  “We’ll find water,” Bobbie Ray told them, glad to have a firm objective in
  mind.
  
  Reoh hesitated. “Uh, that might not be so easy.”
  
  “We’ll find water,