Although both know it is forbidden, Amy and Axel hope that by following the countless ramps leading upward they can escape from their filthy subterranean world.
- ISBN10 0670500267
- ISBN13 9780670500260
- Publish Date 22 September 1980
- Publish Status Out of Stock
- Publish Country US
- Imprint Viking Books for Young Readers
- Format Hardcover
- Language English