無職転生: 異世界行ったら本気だす [Mushoku Tensei: Isekai Ittara Honki Dasu]

無職転生: 異世界行ったら本気だす [Mushoku Tensei: Isekai Ittara Honki Dasu] is a 9-book series with 7 primary works first released in 2015 with contributions by Rifujin na Magonote, 理不尽な孫の手, and 2 others.