One has to admire a children's book that begins with a quote from Baudelaire about Paris - "What strange phenomena we find in a great city, all we need do is stroll about with our eyes open. Life swarms with innocent monsters." Fans of Ruby's previous book in the York series will know it is a perfect fit for the world of steampunk, mystery and alternate-history she created so skillfully in the The Shadow Cipher, the first book of the series. How good it is to see Tess and Theo Biedermann and their friend, Jamie Cruz, and Nine the chimera cat again! They are recovering from the loss of their beloved home, 354 W. 73rd Street, still intent on solving the riddle of the Morningstarr Twins' Cipher in the hopes of defeating the vile developer Darnell Slant's plans to remake New York and possibly run for electoral office. What could be worse? The book leaps into that continuing adventure, with the kids riding a metal carriage underground of NYC on their way to face down mad scientists, evil fembots, and even their own family members' desire to protect them. No matter what they discover by solving the Cipher, they are determined to thwart Slant, who may be almost the most loathsome real estate developer New York has ever faced, "...some rich man who doesn't care about anyone's history or future but his own?"
Ruby delivers another puzzle box of a book, but most of all it is a love letter to a New York that is changing too fast, where the past can be wiped out not just by a construction crane but by callousness, racism and wilful ignorance. Theo, Tess and Jaime must discover the answer "to make them all feel real again, whole again, impervious to everything and everyone, the people who meant to do ill and the ones who meant to do well, because, sometimes, the result was the same." This is a good old-fashioned yarn where baddies are baddies, monsters which take all shapes, and heroes do their best to ride to the rescue of an entire city. There are some real dangers that face them, including animal experimentation, mass environmental damage, and sinister adults straight out of SPECTRE who will do anything to stop them from solving the puzzle. There are villains who believe "in order to fix things, you had to break them." Fortunately there is a diverse cast of heroes ranged against them, including women, senior citizens, and of course, brave children. There are many nods to great scientists of the past, most notable Ada Lovelace and Thomas Jennings, as well as the fantastic influence of the Morningstarrs, whose mystery continues to grow.
Ruby is also masterful at portraying real relationships not just between her child protagonists, but also between them and other adults who may want to help, but also have their own agenda. Hers is the rare world where adults and children must negotiate and cooperate in order to solve not just the mystery, but the secrets of just plain getting along In the spirit of other great children's books such as The Westing Game, From the Mixed-Up Files of Mrs. Basil E. Frankweiler, Chasing Vermeer and When You Reach Me, The Clockwork Ghost is both a worthy successor, a ringing harbinger of the concluding book, and a terrific book in its own right. How else could you feel about a book that announces the children must go "where all the best mysteries are. The New York Public Library." Bring on the next book with bells on!