"In 2014, author and photographer Kyle Cassidy published a photo essay on Slate.com called "This is What A Librarian Looks Like," a montage of portraits and a tribute to librarians. Since then, Cassidy has made it his mission to remind us of how essential librarians and libraries are to our communities. His subjects are men and women of all ages, backgrounds, and personal style-from pink hair and leather jackets to button-downs and blazers. In short,...