DuPrau, Jeanne. The people of Sparks

DuPrau, Jeanne. The people of Sparks. Random House, 2004 [0-375-82824-9]
DuPrau has outdone herself in the sequel to "The city of Ember." Lina and Doon lead over 400 people of Ember out of the cave and wander until they come upon the city of Sparks with a population less than 400. The people of Sparks must make a large sacrifice to help the people of Ember and agree that they can stay for six months while they learn the many things they need to know to survive and build their own city. But it isn't long before resentment starts to build. The arguments grow more serious. In this 338 page book the reader sees how two people forced on each other because of need can let resentment and hate grow until it may not be possible to stop the slide down the slippery slope to armed conflict.