Pale Demon - Kim Harrison (book 9)

Condemned and shunned for black magic, Rachel Morgan has three days to get to the annual witches’ conference and clear her name, and hopefully her brothers wedding or be trapped in the demonic ever-after with her Demon teacher Al . . . forever . But Trent, an elf,  has plans of his own and needs Rachel to get him there in 2 days so he can fulfill a elfin Challenge. So a witch , pixy, Living Vampire and a Elf head out on a road trip from hell. Because not only are the normal killers after Rachel as usually but assassins are out to stop Trent from his goal. Rachel was sure her Shunning was going to lifted and she could go back to her normal life until a coven is sent to kill her after promising to set her free. The coven then learns that to fight demons you have to know some black magic and after finding her guilty of being a black witch demon and sending her to the ever after, they were forced to ask her help with a Day walking soul eating demon not even the other demons could kill.
My rating 4