Bianca M. Schwarz’s third novel in the darkly romantic Gentleman Spy Mysteries series is titled “The Memory of Her.” Eliza Broad, a confident woman and spy, has overcome trauma and loss. Fellow spy Allen Strathem, who has loved Eliza since their first meeting, returns from a mission in Crimea. As danger looms and intrigue unfolds, their once-buried love resurfaces, binding them together against those who wish to see them dead.