Blue Sky (Elfhome book, #2.5)

Blue Sky is a short story set in the Elfhome world, a fantasy series by Wen Spencer.

Pittsburgh – a city from Earth magically stranded on the world of elves. Captain of the Team Big Sky hoverbiking racing team, John Montana has lived in fear for his younger half-brother. Blue Sky isn't the only half-elf in Pittsburgh, but he's the only one whose father was one of the holy warrior caste, the sekasha. John has kept Blue Sky's parentage a secret because sekasha are above the law. They can kill anyone they want; take anything they want. When Blue Sky's secret is discovered, John's only hope to save his brother is their old friend, Tinker.