An open book. Black line artwork on one layer, background color (white) on another to allow use with or without background. See my B&W lightbox for more mono images See more simple graphic imagery in my 'Simple vectors' lightbox Writing Monochrome Symbol Book
Simple set of books and clock icon Nonfiction Development Learning Simple set of books and clock icon
Vector icons set of books, people reading, library isolated on white Child Symbol Globe - Man Made Object Children and adults reading books, International Literacy Day icons