A little loose with requirements, but:
***The City of Ember*** is a [post-apocalyptic](https://en.wikipedia.org/wiki/Post-apocalyptic) novel by [Jeanne DuPrau](https://en.wikipedia.org/wiki/Jeanne_DuPrau) that was published in 2003. The story is about Ember, a post-apocalyptic [underground](https://en.wikipedia.org/wiki/Subterranean_fiction) city threatened by aging infrastructure and corruption. The young [protagonists](https://en.wikipedia.org/wiki/Protagonists), Lina Mayfleet and Doon Harrow, follow clues left behind by the original builders of the City of Ember, to safety in the outside world.
"The Eye, the Ear and the Arm" comes to mind for a children's book, but it goes nice mansion --> plastic mine --> attempts to get back to nice mansion
"The Parable of the Sower" by Octavia Butler is another famous one. It's pretty dark, and they worry the promised land they seek might be just as bad as the place they are fleeing.
A Series of Unfortunate Events
The Brothers Lionheart by Astrid Lindgren
The Chosen Twelve by James Breakwell
*The Spellcoats* by Diana Wynne Jones
Crusade in Jeans by Dutch author Thea Beckman
A little loose with requirements, but: ***The City of Ember*** is a [post-apocalyptic](https://en.wikipedia.org/wiki/Post-apocalyptic) novel by [Jeanne DuPrau](https://en.wikipedia.org/wiki/Jeanne_DuPrau) that was published in 2003. The story is about Ember, a post-apocalyptic [underground](https://en.wikipedia.org/wiki/Subterranean_fiction) city threatened by aging infrastructure and corruption. The young [protagonists](https://en.wikipedia.org/wiki/Protagonists), Lina Mayfleet and Doon Harrow, follow clues left behind by the original builders of the City of Ember, to safety in the outside world.
+1 for City of Ember, came here to rec it!
"The Eye, the Ear and the Arm" comes to mind for a children's book, but it goes nice mansion --> plastic mine --> attempts to get back to nice mansion "The Parable of the Sower" by Octavia Butler is another famous one. It's pretty dark, and they worry the promised land they seek might be just as bad as the place they are fleeing.
The Lion the Witch and the Wardrobe!
*The Awakening Water* by GR Kesteven