Ascendance of a Bookworm (Japanese: 本好きの下剋上 ～司書になるためには手段を選んでいられません～, Hepburn: Honzuki no Gekokujō: Shisho ni Naru Tame ni wa Shudan o Erandeiraremasen, lit. "Ascendance of a Bookworm: I'll Stop at Nothing to Become a Librarian") is a Japanese light novel series written by Miya Kazuki and illustrated by You Shiina. It was serialized online from September 2013 to March 2017 on the user-generated novel publishing website Shōsetsuka ni Narō. It was later acquired by TO Books, who has published thirty-three volumes since January 2015.
A manga adaptation of the first part with art by Suzuka was serialized online via Niconico Seiga website from October 2015 to July 2018. It was collected in seven tankōbon volumes by TO Books. Both the light novel and manga are published in English by J-Novel Club. An anime television series adaptation produced by Ajia-do Animation Works aired the first part from October to December 2019, and the second part aired from April to June 2020. A two-part OVA episode released in March 2020. A third season aired from April to June 2022. A fourth season produced by Wit Studio has been announced.
