Black Butler: Book of Circus is a tV series anime that premiered in summer 2014, produced by A-1 Pictures.

About the production: the story comes from a manga, there are 10 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, fantasy, mystery and supernatural, with themes such as Demons, Butler, Circus and Anti-Hero.

On AniList, Black Butler: Book of Circus has an average score of 78%, a very good score, and appears on 82,295 users' lists.

The franchise continues in or follows from: Kuroshitsuji: Book of Murder and Kuroshitsuji.

In late-nineteenth-century England, the Noah's Ark Circus enlivens the city of London with their grandeur and spectacular stunts. However, children are mysteriously disappearing from the town in a manner correlating to the troupe's movement. The Queen, then, sends her notorious Watchdog, Ciel Phantomhive, on an investigative mission to retrieve the missing children. Ciel and his demon butler, Sebastian Michaelis, infiltrate the circus, disguised as team members, to study and possibly unearth its ulterior motive. This arc immediately follows the Curry Contest Arc in the manga, which ended at episode 15 in the first season of the anime.

Official synopsis from AniList.