井上堅二
井上堅二 has written at least 14 books. Their most popular book is ぐらんぶる 1 with 1 save with an average rating of -⭐.
Authorship percentage indicates primary author status - excluding introductions, forewards and other contributions.
Series
20 primary books21 released booksAuthored 62% of series
ぐらんぶる [Grand Blue]
ぐらんぶる [Grand Blue] is a 21-book series with 21 released primary works first released in 2014 with contributions by Kenji Inoue, 井上堅二, and 吉岡公威.
