Silver Shadows (Forgotten Realms: The Song & Sword Series Book 3) by Elaine Cunningham

While Danilo is dealing with the troubles in Waterdeep Arilyn has been given a different task. She is to resolve the conflict between the elves of the forest of Tethir and the humans of the area. To do this she must go live among the elves pretending to by a full moon elf due to the wild elves hatred of all none elven. During the mission she will find that her moonblade shares a history with the forest and she realises some truths about herself.

Once you get over the disappointment of Danilo not being involved you will find that Arilyn can carry the story on her own. There is a lot less humour then when Danilo is about but it is n intriguing story that keeps entertained