- Author: Rob Harper
- Language: English
- Year: 2017
- Author: Kyle Harper
- Language: English
- Year: 2017
- Author: Kyle Harper
- Language: English
- Year: 2021
- Author: Harper Montgomery
- Language: English
- Year: 2017
- Author: Jo Harper (editor)
- Language: English
- Year: 2018
- Author: Thomas Harper (editor), Haruo Shirane (editor)
- Language: English
- Year: 2015
- Author: Tim Harper
- Language: English
- Year: 2021
- Author: Kyle Harper
- Language: English
- Year: 2013
- Author: Alexander Petrunkevitch, Samuel Northrup Harper, Frank Alfred Golder, Robert Joseph Kerner
- Language: English
- Year: 1918