"The Reformed Librarie-Keeper" (1650) is a book written by John Dury, a famous British writer and librarian of the 17th century. In this work, the author shares his thoughts and recommendations on effective library management. He gives advice on the organization of book collections, preservation and cataloging of books, and emphasizes the importance of making literature accessible to the general public. This book is considered an important source for the development of librarianship and is a valuable addition to the literature on the history of library science.