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 Greenteeth. When Mallt, the goddess of death, is accidently turned 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? Unable to fend for herself, she teams up with Belis, warrior daughter of Boudicca, on a perilous journey to the afterlife to try to restore her powers. Frustrated by her frail human body and its inability to run a hundred miles in a single day, Mallt might not make the best travelling companion. But as animosity slowly turns to attraction, these two very different women must learn to work together if they are to have any hope of surviving their quest.