Harbinger of Darkness — Richard C. White

Raven is the night. Perrin, the day. One is an accomplished thief, and an enigma. Never seen in the light of day, no one is quite sure where she goes or where she hides the bounty of her crimes. The other is a bookseller's daughter, trapped by expectations and circumstances but with dreams of exploring the lands she's only read about. And both share a great secret:

That Perrin and Raven are the same person.

A magic pendant allows Perrin to disguise herself, keeping her other life as Raven hidden from everyone, even her closest allies. But after the theft of a mystical gem, which unbeknownst to her is the lynchpin for a cruel king's upcoming military campaign, both of her worlds are upended, with potentially fatal consequences for friends, family... and Perrin herself.

With bounty hunters and the king's personal assassins pursuing her darker half, Perrin is swept into a conspiracy against the throne she despises. Add in the complication of an apprentice thief she never wanted to train, and the odds of Perrin living long enough to pursue her dreams are steadily shrinking...

A swashbuckling fantasy adventure from Richard C. White, the acclaimed author of For a Few Gold Pieces More and Terra Incognito: A Guide to Building the Worlds of Your Imagination.