Volumes disappear and reappear on the shelves, but the ghosts of literature aren’t the only mysterious visitors in Roger Mifflin’s haunted bookshop.   Mifflin, who hawked books out of the back of his van in Christopher Morley’s beloved Parnassus on Wheels, has finally settled down with his own secondhand bookstore in Brooklyn. There, he and his wife, Helen, are content to live and work together, prescribing literature to those who hardly know how much they need it. When Aubrey Gilbert, a young advertising man, visits the shop, he quickly falls under the spell of Mifflin’s young assistant, Titania. But something is amiss in the bookshop, something Mifflin is too distracted to notice, and Gilbert has no choice but to take the young woman’s safety into his own hands.
