It is the misfortune of this paper that it has been obliged to dwell on the darker side of library work. It is hardly necessary to remind an audience of librarians that this is not the prominent side. All users of a library are not delinquents or law-breakers, and the assistants have other and better work than to act as fine-collectors and detectives. The sombre effect of what you have just heard should have been dispelled by a paper on “Rewards and delights of library work,” but this the Program Committee has seen fit to omit, probably because it is not necessary to emphasize the obvious. HOW LIBRARIANS CHOOSE BOOKS The form in which this subject is stated removes it from the region of ethics and brings it down to the hard realms of fact I am not to tell you how librarians ought to select books, but how they do select them. I shall assume, however, that you do not care to have this paper filled with instances of abnormal and unprofitable selection, but that you wish to hear of the normal and the unobjectionable. Booksellers tell us that many buyers of books are governed in their choice by the color of the covers, and I have suspected that some librarians are influenced in the same way. Some librarians appear to object to works that are less than one century old; others are on record as discouraging the purchase of fiction less than one year of age. Some librarians have a prejudice against certain classes of books and an inordinate love for others. The only things that should be considered by the librarian in buying books for his library are the needs of the community that he serves, the capability of the various books under consideration to satisfy those needs, and the financial ability of the library to secure what is needed.