Ryan Costello Jr. has written at least 1 book. Their most popular book is Pathfinder Campaign Setting: Giants Revisited with 1 save with an average rating of -⭐.
Series
1 released bookAuthored 2% of series
Pathfinder Campaign Setting is a 53-book series first released in 2008 with contributions by F. Wesley Schneider, Alyssa Faden, and 56 others.