"Intricate clockworks, wheels within wheels."
— Booklist (starred)
"Snappy prose and a captivating plot distinguish King's fourteenth novel featuring Mary Russell and her husband, Sherlock Holmes. . . . Many will find the character deepened by his partnership with the spirited and clever Russell. This book gives every indication that this series still has a long life ahead of it."
— Publishers Weekly
"Compulsively readable . . . Through astute, precise, and elegant writing, great attention to time and place, and beautifully realized characters, King has created a mystery series that is at once intelligent, reflective, and action filled."
— Library Journal