An Accident Waiting to Dragon by Abigail Owen

It’s not the heat…it’s the pixie dust.

The day her brother died, Gwendolyn Moonsoar fled from her veil of pixies. Grief drove her away, but a broken heart made her stay gone for good. Lucky for Gwen, Brimstone Inc. was there to break her fall. Now, as a special courier transporting the most valuable and dangerous items of the supernatural world, Gwen is good at her job. Damn good. After all, disappearing is her specialty.
Dragon shifter Asher Kato will always be haunted by his best friend Goran’s death. Although a promise he made gave him no choice, Asher will never forgive himself for the role he played…or the fallout it caused with Goran’s younger sister, Gwen. Burying himself in his role as second-in-command of the blue dragons is his only escape. Unfortunately, the peace they fought so hard for isn’t meant for a warrior like him. So, when a courier transporting a rare basilisk egg goes missing, Asher volunteers to track her down.

Except Asher’s mission leads him straight into the arms of the one pixie who would rather vanish forever than spend a single second with him…