| #2 |  A Duty to the Dead
| 3.8 |
| #3 |  An impartial witness
| 3.75 |
| #4 |  The Romanov Empress
| 4 |
| #5 |  Born to Rule: Five Reigning Consorts, Granddaughters of Queen Victoria
| 3 |
| #6 |  The Philosopher's War The Philosopher's War
| 5 |
| #7 |  The White Feather Killer
| 2 |
| #8 |  The Golden Hour
| 3.57 |
| #9 |  The Royal Nanny
| 5 |
| #10 |  A Bitter Truth
| 3.5 |
| #11 |  City of Scoundrels
| 4 |
| #12 |  Lady Clementine
| 3.63 |
| #13 |  An unmarked grave
| 3.67 |
| #14 |  The Poppy Wife The Poppy Wife: A Novel of the Great War
| 2 |
| #15 |  Life After Life
| 3.64 |
| #16 |  A Pretty Deceit
| 3.8 |
| #17 |  A Question of Honor
| 3.75 |
| #18 |  City of Schemes
| 4.5 |
| #19 |  An Unwilling Accomplice
| 3 |
| #20 |  Band of Sisters
| 4.38 |
| #21 |  The Women of Chateau Lafayette
| 3.42 |
| #22 |  The Hidden Palace
| 4.18 |
| #23 |  Murder Most Fair
| 3.5 |
| #24 |  The Ice Swan
| 3 |
| #25 |  Innovation
| 0 |
| #26 |  The Great Influenza: The Story of the Deadliest Pandemic in History
| 3 |
| #27 |  A Pattern of Lies
| 3 |
| #28 |  The Dictionary of Lost Words
| 4.13 |
| #29 |  Betrayal at Ravenswick
| 3 |
| #30 |  The Last Grand Duchess
| 3 |
| #31 |  City of Shadows
| 3.5 |
| #32 |  The Magnificent Lives of Marjorie Post
| 3.5 |
| #33 |  George V George V: Never a Dull Moment
| 0 |
| #34 |  The Facemaker The Facemaker: A Visionary Surgeon's Battle to Mend the Disfigured Soldiers of World War I
| 5 |
| #35 |  Midnight on the Marne
| 4 |
| #36 |  The White Lady
| 3.67 |
| #37 |  The President’s Wife
| 0 |
| #38 |  City of Fortune
| 4.5 |
| #39 |  Little Souls
| 0 |
| #40 |  American Midnight
| 4.17 |
