Dust danced between the sunbeams shining through the front window of the old shop. The smell of lavender and mildew drifted through the small space, which was filled with a maze of bookshelves, many of them pressed at odd angles against each other. The individual shelves were organized in a similar manner, each decorated with random objects—books, jewelry, herbs, vials, clocks—all ranging from magical to ordinary.   Lena had spotted the shop as she roamed the cobblestone streets outside....