Professor Hélio Gomes Machado gives a speech in favor of the library as an element of spiritual progress for a people. Description of a model library. The characteristics of the building, the functional furniture, the need for an auditorium, the classification of books, the binding and their checking. The description of works through cataloging based on the Vatican Library Code. The book card is typed and incorporated into the general catalogue. Then the books are organized on the shelf. Exchange between libraries, with books not requested by the public and duplicates. The reference section is essential, as its works are for consultation and not for loan. The children's section. Complete registration to use library services. The catalog that refers to decimal classification. Loan control. The reading room and consultants. Finally, the Castro Alves Library is considered a model to be adopted in the country.