Darkover novels
After Lew Alton unwittingly roused the fire demon Sharra, the Sword of Aldones was the only weapon that could lay her to rest again. But only one man could wield the sword, and getting it was an even bigger problem.
16) Thendara House
Nobody alive knew how the feud between Storn and Hammefell had begun, but that didn't stop the fighting. When Storn's men burned Hammerfell's castle, his infant twin sons were separated, and each grew up thinking himself the rightful Duke of Hammerfell. Conn, raised in the mountains by his father's paxman, continued to fight the Storns. Alastair grew up with his mother in Thendara and planned to marry his cousin Floria. But when Conn came to Thendara
...Leonie Hastur has a high degree of laran, the telepathic power of the Comyn caste, and wants to be Keeper of Arilinn Tower, which will give her as much power as her twin brother Lorill, Heir to Hastur. But she has a premonition that something strange and disturbing will come from the sky and change their world forever. She's correct.
Ysaye Barnett loves life on shipboard and would happily stay right there, with her beloved computers, forever.