Attack on Titan: Before the Fall
Attack on Titan: Before the Fall (進撃の巨人 Before the fall, Shingeki no Kyojin: Before the Fall) is a series of Japanese light novels written by Ryō Suzukaze and illustrated by THORES Shibamoto. The three novels were published in 2011 and 2012. The series is a prequel to Hajime Isayama's Attack on Titan manga series. A manga adaptation by Satoshi Shiki was serialized between 2013 and 2019. Source: Wikipedia (en)
Series - wd:Q21160018