Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Appleton Case | 2015 | Diana Xarissa Dunn | Buy |
| 2 | The Bennett Case | 2015 | Diana Xarissa Dunn | Buy |
| 3 | The Donaldson Case | 2016 | Diana Xarissa Dunn | Buy |
| 4 | The Ellsworth Case | 2016 | Diana Xarissa Dunn | Buy |
| 5 | The Fenton Case | 2016 | Diana Xarissa Dunn | Buy |
| 6 | The Green Case | 2016 | Diana Xarissa Dunn | Buy |
| 7 | The Hampton Case | 2017 | Diana Xarissa Dunn | Buy |
| 8 | The Irwin Case | 2017 | Diana Xarissa Dunn | Buy |
| 9 | The Jackson Case | 2017 | Diana Xarissa Dunn | Buy |
| 10 | The Kingston Case | 2017 | Diana Xarissa Dunn | Buy |
| 11 | The Lawley Case | 2018 | Diana Xarissa Dunn | Buy |
| 12 | The Moody Case | 2018 | Diana Xarissa Dunn | Buy |
| 13 | The Norman Case | 2018 | Diana Xarissa Dunn | Buy |
| 14 | The Osborne Case | 2018 | Diana Xarissa Dunn | Buy |
| 15 | The Patrone Case | 2019 | Diana Xarissa Dunn | Buy |
| 16 | The Quinton Case | 2019 | Diana Xarissa Dunn | Buy |
| 17 | The Rhodes Case | 2019 | Diana Xarissa Dunn | Buy |
| 18 | The Somerset Case | 2020 | Diana Xarissa Dunn | Buy |
| 19 | The Tanner Case | 2020 | Diana Xarissa Dunn | Buy |
| 20 | The Underwood Case | 2020 | Diana Xarissa Dunn | Buy |
| 21 | The Vernon Case | 2020 | Diana Xarissa Dunn | Buy |
| 22 | The Walters Case | 2020 | Diana Xarissa Dunn | Buy |
| 23 | The Chalmers Case | 2015 | Diana Xarissa Dunn | Buy |
| 24 | The Xanders Case | 2020 | Diana Xarissa Dunn | Buy |
| 25 | The Young Case | 2020 | Diana Xarissa Dunn | Buy |
| 26 | The Zachery Case | 2020 | Diana Xarissa Dunn | Buy |
The Markham Sisters series is another of Diana Xarissa Dunn’s A-to-Z mystery runs, following a pair of sisters as they investigate cases. The Appleton Case (2015) starts the alphabet, and The Zachery Case (2020) completes it at 26 books. Each case is named after a key person involved in the mystery.
The sibling dynamic gives the series a different feel from Dunn’s solo-investigator series. The Markham sisters bring different perspectives and skills to each case, and their relationship provides an ongoing thread across the alphabetical progression of mysteries.