This book, the sequel to “Parnassus on Wheels,†follows Roger and Helen Mifflin to their brick-and-mortar bookstore in Brooklyn. It‘s a weird mash-up of a mystery punctuated by Roger‘s lengthy harangues about the state of the world. Not as charming as the first book, but still a pick for me because Morley‘s prose is almost hypnotic. I love the way he can turn a phrase.