Grail

In the gripping finale of Elizabeth Bear's acclaimed Jacob's Ladder trilogy, the passengers of the generation spaceship Jacob's Ladder arrive at their new home, the planet Grail. However, they soon discover that Grail is already occupied by genetically engineered humans who are determined to protect their territory, setting the stage for a tense struggle for coexistence. Booklist praises this richly imagined universe, making it a compelling conclusion to the series that started with Dust and Chill.