The Last Equation of Isaac Severy by Nova Jacobs
Receiving a cryptic letter from her famous mathematician grandfather just before his suicide, adopted granddaughter Hazel, the owner of a struggling bookstore in Seattle, is charged with tracking down and protecting a dangerous equation before dangerous enemies can exploit it.
A Lady's Guide to Etiquette and Murder by Dianne Freeman
Wealthy young widow Frances Wynn, the American-born Countess of Harleigh, moves from the English countryside to Victorian London, where accusations that implicate her in her late husband's death cause her to begin her own investigation.
A Treacherous Curse by Deanna Raybourn
When the enigmatic Stoker's former expedition partner goes missing from an archaeological dig with a priceless Egyptian diadem, Victorian adventurer Veronica Speedwell investigates mishaps that have plagued the expedition as well as malevolent enemies that threaten Stoker's career.