There are 1 book by Hiroichi on BookOrb. A strong starting point is High School DxD (2014). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Hiroichi written?
BookOrb lists 1 book by Hiroichi.
Where should I start with Hiroichi?
A good starting point is High School DxD (2014).
What is the Hiroichi books in order list?
In publication order: 1. High School DxD (2014).