Iskryne World Series by Sarah Monette, Elizabeth Bear

A Companion to Wolves is the story of a young nobleman, Isolfr, who is chosen to become a wolfcarl -- a warrior who is bonded to a fighting wolf. Isolfr is deeply drawn to the wolves, and though as his father's heir he can refuse the call, he chooses to go. The people of this wintry land depend on the wolfcarls to protect them from the threat of trolls and wyverns, though the supernatural creatures have not come in force for many years. Men are growing too confident... moreA Companion to Wolves is the story of a young nobleman, Isolfr, who is chosen to become a wolfcarl -- a warrior who is bonded to a fighting wolf. Isolfr is deeply drawn to the wolves, and though as his father's heir he can refuse the call, he chooses to go. The people of this wintry land depend on the wolfcarls to protect them from the threat of trolls and wyverns, though the supernatural creatures have not come in force for many years. Men are growing too confident. The wolfhealls are small, and the lords give them less respect than in former years.  But the winter of Isolfr's bonding, the trolls come down from the north in far greater numbers than before, and the holding's complaisance gives way to terror in the dark. Isolfr, now bonded to a queen wolf, Viradechtis, must learn where his honor lies, and discover the lengths to which he will to go when it, and love for his wolf, drive him. less

In Iskryne, the war against the Trollish invasion has been won, and the lands of men are safe again--at least for a while.  Isolfr and his sister, the Konigenwolf Viradechtis, have established their own wolfhaell. Viradechtis has taken two mates, and so the human pack has two war leaders. And in the way of the pack, they must come to terms with each other, must become brothers instead of rivals--for Viradechtis will not be gainsaid.She may even be prescient.A new danger comes to Iskryne... moreIn Iskryne, the war against the Trollish invasion has been won, and the lands of men are safe again--at least for a while.  Isolfr and his sister, the Konigenwolf Viradechtis, have established their own wolfhaell. Viradechtis has taken two mates, and so the human pack has two war leaders. And in the way of the pack, they must come to terms with each other, must become brothers instead of rivals--for Viradechtis will not be gainsaid.She may even be prescient.A new danger comes to Iskryne. An army of men approaches, an army that wishes to conquer and rule. The giant trellwolves and their human brothers have never hunted men before. They will need to learn if they are to defend their homes. less

“[Bear and Monette] have boldly created a fascinating world that begs further exploration.”—Publishers Weekly, starred review, on A Companion to WolvesSarah Monette and Elizabeth Bear return with the third book in their Iskryne trilogy, An Apprentice to Elves. The trilogy began with A Companion to Wolves, and continued in The Tempering of Men. This novel picks up the story of Alfgyfa, a young woman who has been raised in the Wolfhall by her father, Isolfr... more“[Bear and Monette] have boldly created a fascinating world that begs further exploration.”—Publishers Weekly, starred review, on A Companion to WolvesSarah Monette and Elizabeth Bear return with the third book in their Iskryne trilogy, An Apprentice to Elves. The trilogy began with A Companion to Wolves, and continued in The Tempering of Men. This novel picks up the story of Alfgyfa, a young woman who has been raised in the Wolfhall by her father, Isolfr.The warrior culture of Iskryne forbids many things to women—and most especially it forbids them bonding to one of the giant telepathic trelwolves. But as her father was no ordinary boy, Alfgyfa is no ordinary girl. Her father has long planned to send his daughter to Tin, a matriarch among the elves who live nearby, to be both apprentice and ambassador, and now she is of age to go. less