At the My Hero Academia panel at San Diego Comic-Con 2018, it was announced that Viz Media and Shonen Jump will be bringing the novel series, My Hero Academia: School Briefs, to the United States in Spring of 2019.
Further details are scarce, but the “School Briefs” subtitle may indicate a look at My Hero Academia’s characters at school and learning more about them in-between the chaos that occurs in the original series.
Source: IGN.com My Hero Academia Gets a Spin-Off Novel Series