Curse The Dawn by Karen Chance
Cassie Palmer, the world's chief clairvoyant, just can't seem to stay away from trouble. After trying to come to an agreement with the Silver Circle - the magical organisation that's been trying to kill her for years - she finds herself kidnapped by one of its members and swept away in the ley line system, a series of magical currents that occupies the space between worlds. Cassie manages to escape but, fearing for her safety, she decides to invest in a magical device for protection. However, all she can afford is a statue that grants wishes . . .
But what Cassie doesn't realize is that the statue doesn't always grant wishes the way the wisher would like. And when she wishes for the strength to shift herself and companion Pritkin away from a dangerous fight, the statue grants the wish by switching her into Pritkin's body and him into hers. And that's when the real trouble starts . . .