Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Letters in Time | 2021 | Susan Reiss | Buy |
| 2 | Diaries in Time | 2022 | Susan Reiss | Buy |
| 3 | Stillness in Time | 2022 | Susan Reiss | Buy |
| 4 | Messages in Time | 2022 | Susan Reiss | Buy |
| 5 | Portraits in Time | 2023 | Susan Reiss | Buy |
| 6 | Devoted in Time | 2024 | Susan Reiss | Buy |
| 7 | Deceit in Time | 2025 | Susan Reiss | Buy |
| 8 | Treasures in Time | 2025 | Susan Reiss | Buy |
In Time is an eight-book series by Susan Reiss published between 2021 and 2025. The series uses time travel as its central device, sending the protagonist into different historical periods to investigate crimes, uncover secrets, and recover lost knowledge. The books are published in the order: Letters in Time, Diaries in Time, Stillness in Time, Messages in Time, Portraits in Time, Devoted in Time, Deceit in Time, and Treasures in Time.
The series should be read in publication order, as the protagonist’s relationship with the time-travel mechanism and her personal life develop across the books. Each volume can be enjoyed independently as a historical mystery, but the character arc rewards readers who follow the series from the beginning.
Reiss uses the time-travel framework to combine contemporary mystery plotting with historical fiction. Each book’s title signals both the historical period and the type of artifact or communication at the center of the mystery.