All the birds in the sky (Titan Books)

Friends Patricia Delfine, a witch, and Laurence Armstead, a mad scientist, parted ways during middle school. But as adults they both wind up in near-future San Francisco, where Laurence is an engineering genius and Patricia works with a small band of other magicians to secretly repair the worlds ever growing ailments. But something is determined to bring them back together-to either save the world, or end it