Nightshade and Oak — Molly O'Neill

An Iron Age goddess must grapple with becoming human in this delightful historical fantasy of myth and magic from the author of the instant hit Greenteeth.   When Malt, the goddess of death, is accidentally turned into a human by a wayward spell, she finds she's ill-equipped to deal with the trials of a mortal life. After all, why would a goddess need to know how to gather food or light a fire?   Trapped in a body that's frustratingly feeble, she's forced to team up with Bellis, warrior daughter of Boudicca on a perilous journey across Roman-occupied Britain to the afterlife to try to restore her powers. As animosity turns to attraction, these two very different women must learn to work together if they are to have any hope of surviving their quest.