Bargain @ 99 cents from BookViewCafé as one of their monthly specials, IIRC, so probably expiring today (March 31st), DRM-free choice of ePub or Mobi available worldwide:
Guardian of the Balance by
Irene Radford (
ISFDB), 1st in her Merlin's Descendants series of Arthurian-derivative high fantasy novels, this installment originally out from DAW Books in 1999.
Merlin’s daughter must help both her father and King Arthur demonstrate to warring barons and invading Saxons that Honor, Truth and Promises are meant to be kept; Justice, Peace, and Law must prevail
Caught between her beloved father, the Merlin of Britain, and Arthur Pendragon, the old ways and the new, Wren must find a way to balance the forces of Chaos with peace.
She nurtures the land and the people, creating a haven for anyone displaced by the turbulence. And for the safety of all she must guard her heart against the deep love she shares with Arthur, a married king who holds the future of all the Britains in his hands and his sword.