Shadow & Dagger Series by Anne Logston

Elf animal-speaker Chyrie must help forge an alliance between her race and the despised humans if they are to survive the barbarian invaders who threaten both people.

Raised among humans, the elf Ria has always dreamed of returning to the forest where she was born and finding her lost twin brother. But Ria has been chosen to mend the splintered alliance between humans and elves by marrying a human. With peace at stake, Ria must decide if she'll be happy living between two worlds or if she should answer the call of blood and family.

Never trust an elf, a thief, or a woman. Shadow is all three... Shadow, a light-hearted (and light-fingered) elven thief, returns to her homeland after several centuries' absence only to find that a great human trade city has grown up next to the forest in which she was born. Now the elves and the humans maintain an uneasy alliance, but when Shadow steals a magical bracelet, she finds herself caught in the middle of a plot that may tear the city-and the alliance-apart forever.

She's a master thief as elusive as her name whose dagger is as sharp as her eyes and wits. Where there's a rich merchant to rob, good food and wine to be had, or a lusty fellow to kiss ... there's Shadow. What do the Guild of Thieves, the deadliest assassin in Allanmere, a long-vanished mage, a treacherous swamp, and a gem missing from a temple have in common? Shadow, of course... moreShe's a master thief as elusive as her name whose dagger is as sharp as her eyes and wits. Where there's a rich merchant to rob, good food and wine to be had, or a lusty fellow to kiss ... there's Shadow. What do the Guild of Thieves, the deadliest assassin in Allanmere, a long-vanished mage, a treacherous swamp, and a gem missing from a temple have in common? Shadow, of course. When Shadow is accused of a theft of guild-wrecking proportions, she forms an unlikely alliance with the strange immortal creature known only as Blade to find out who has framed her and the Guild of Thieves for the theft-and why. Deadly Companion! When shadow has to recover a stolen jewel from the wizard Baloran, her journey is as perilous as her destination. For only Blade can guide Shadow to the sorcerer's lair ... and Blade is an assassin who takes a life as easily as she takes a breath. Shadow's score with Baloran can end only in destruction. But in the final battle, will Blade be at Shadow's side-or in her way? less

A deadly plague is sweeping through Allanmere, brought by a stranger whose race vanished long before the humans of Allanmere, or the elves of the forest, came to the land. Now Shadow must lead that stranger and her best friend Donya into the deadly swamp known as the Dim Reaches in search of a cure for the plague hidden among the traces of a race long gone.

Donya's daughter is known as "Jaellyn the Unlucky" -- clumsy, seemingly frozen in childhood, and cursed to foul up any magic in her vicinity. But when a series of strange and horrible murders in Allanmere seem to center around the handsome young priest courting her, Jael's talent for mayhem, and the secret surrounding her birth, may save the city.

Jaellyn's mixed heritage gives her powerful magic, but a portion of her soul is missing, and she must risk her life to save her future, confronting bloodthirsty dragons and hideous shape shifters as she searches for her father.