Negima! Magister Negi Magi Volume 23 (Limited Edition) was released in Japan on August 12, 2008 by Kodansha for ¥3,400. This is the 23rd volume of a series of 38 books in total about the challenges of Negi, a child wizard who is tasked with teaching a class of junior-high girls all while searching for clues to lead to his missing father. It was written by author, Ken Akamatsu.
光の魔法と闇の魔法、どちらの修業をするか悩むネギに、ある巻物が渡された! 昔、エヴァンジェリンが記した「闇の魔法」の巻物で、闇を選ぶなら開けろとラカンから伝えられる。悩んだ結果、父親と違う闇を選んだネギ! 巻物を開けた瞬間、エヴァが出てきて、ネギに襲いかかる‥‥!!
-- Kodansha