'In an old tunnel under France, a door leads to a tiny pocket universe called Tsarfat. If you survive the passage through that door, you will become an Envoy to an Earth that’s just a bit different from ours. Earth2 not only has many kinds of magic, it has government offices to regulate that magic.
'Once you’re through the door, people will call you a Green Child, or a superhero. So many of your dreams will come true.
'Something is very wrong on Earth2. The Green Children are dying. Pits full of fire and brimstone are opening in churches. Doors into a Nazi-ruled universe are appearing.
'The Green Children and their friends at the Offices of the Non-Natural Environment have two new tasks: to save themselves … and the world.'
Source: Publisher's blurb.