A Good Librarian Like a Good Shepherd, known in Japan as Daitoshokan no Hitsujikai (Japanese: 大図書館の羊飼い; lit. Large Library's Shepherd or The Shepherd of the Great Library), is a Japanese adult visual novel developed by August and released on January 25, 2013 for Windows as a DVD. The gameplay in Daitoshokan no Hitsujikai follows a branching plot line which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the five female main characters by the player character. A fan disc for Windows titled Daitoshokan no Hitsujikai: Hōkago Shippo Days was released in August 2013. A second, adult fan disc titled Daitoshokan no Hitsujikai: Dreaming Sheep was released in March 2014. A PlayStation Vita port of the original game and fan discs featuring additional content was released in February 2015.

There have been five manga adaptations based on the game published by ASCII Media Works, Ichijinsha, Kadokawa Shoten and Media Factory. Comic anthologies and light novels were also published, as were several music albums. An anime television series adaptation animated by Hoods Entertainment and Felix Film aired between October and December 2014.

Set in the vast and prestigious Shiomi Academy (汐美学園, Shiomi Gakuen), Kyōtarō Kakei is a student and the only member of the Library Club (図書部, Tosho-bu). When Kyōtarō was young, he aspired to read all the magic books in the world which were kept in the magic library. He was given a bookmark by a shepherd, which was his entry ticket to access the magic library. He must show kindness and bring happiness to people he encounters. As the sole member of the Library Club, he enjoys the fact that he can read peacefully by himself. After receiving a text from the 'shepherd', which reads his fate is going to change, Kyōtarō encounters a second-year girl named Tsugumi Shirasaki, whom he saves at the train station. Later that day, Tsugumi enters the Library Club, she thanks him, and asks for his help to make Shiomi Academy a more enjoyable place. Like Kyōtarō, Tsugumi has also received a text from the shepherd. With the shepherd's guidance, more students end up joining their group.