Thin Skinned by Margo Bond Collins

Sometimes, even a snake shifter isn’t quite scary enough.
When Lindi Parker took her first job out of grad school, she didn’t expect to end up hurtling toward a showdown with a group of drug dealers spiriting a child out of the country.
But here she is, a stowaway, trapped on a plane. In a coffin. In her serpent form.
When she runs across a medallion that might be a clue to her past, something no desert foundling weresnake could resist, she realizes she might have even more to gain from this trip than just saving a child.
Assuming she survives.
This might require a little creativity.
And a little more poison behind her fangs.