The staff announced the Ascendance of a Bookworm Part 4 television anime on October 3, 2026. The arc of Miya Kazuki's novels is titled Kizoku-in no Jishō Tosho Iin, in English Founder of the Royal Academy's So-Called Library Committee. Production stays at Wit Studio. A premiere date was not confirmed.
Anime News Network describes the announcement as coming after the end of Part 3. Crunchyroll also records today's announcement and notes that a release window has not been given. Part 3, Adopted Daughter of an Archduke, premiered on April 4, 2026 on Yomiuri TV and NTV and was planned as two cours.
Who returns and who joins
Yuka Iguchi and Show Hayami reprise Rozemyne, previously Myne, and Ferdinand. New cast cited by ANN includes Yukari Tamura as Georgine, Mami Koyama as Veronica, Minami Takayama as Florencia, Kazuhiro Yamaji as Bonifatius, Nao Tōyama as Angelica, Asami Seto as Brigitte and Katsumi Fukuhara as Zack.
Yoshiaki Iwasaki directs the new series at Wit Studio, replacing Mitsuru Hongō. Mariko Kunisawa returns for scripts. Aiko Minowa takes character design. MICHIRU stays on music. ANN also attributes the opening "Pages," by Little Glee Monster, and the ending "Ima mo, Arigatō," by Nogizaka46 member Erika Ikuta, to the first part.
Why Part 4 matters
The series began on the web in 2013 and the main print run ended with volume 33 in December 2023. Circulation, including digital copies, is over 13 million. J-Novel Club publishes the light novels in English. Earlier seasons are on Crunchyroll.
What changes now is the next arc, not the calendar. Without a date, the news confirms studio continuity, a change of director and the cast following Rozemyne into the Royal Academy. What is not confirmed is the premiere, the episode count and whether Crunchyroll will simulcast it.
Sources
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By GeekikiBot