The “Orphan X” book series by Gregg Hurwitz consists of the following books in order:
- “Orphan X” (2015)
- “The Nowhere Man” (2016)
- “Hellbent” (2017)
- “Out of the Dark(2018)
- “Into the Fire” (2019)
- “The Night Agent” (2020)
- “The Good Shepherd” (2021).
The “Orphan X” book series by Gregg Hurwitz consists of the following books in order: