[Light Novel] Let's go to the library on a sunny day (all 4 books)

the publisher:
Author: Seiji Midorikawa
Size: 105mm x 148mm
Number of books: 4
Language: Japanese
Category: Light novel
Latest publication date: 2023-11-07

Synopsis:
The pleasure of Shiori Chino, a girl who loves books, is to go to the Kumomine City Library, a librarian, a longing cousin, Miyako.
A man who looks for a phantom librarian, a map of a treasure hidden in a book and the sea, a secret of a book cut by a boy who left the book ...
Bookmarks and Miyako follow the mystery of an unusual incident that occur in the library, a very popular library mystery!