[1] Adler began collecting books and prints while working at his family's clothing firm in Rochester, New York.
His father put him to work in his family business, L. Adler, Bros & Co. Alder was a salesman and later got promoted to an advertising manger.
[1] In 1922, he established Pynson Printers in New York City and began designing books with Burton Emmett and John T. Winterich.
He ended the publication in 1940 when he was invited to establish a Department of Graphic Arts at Princeton University.
[3] In 1955, he established an art-of-the-book program, La Casa del Libro, in Puerto Rico.