This icon is a part of a collection of Regał na książki flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
The Book Shelf icon is a small table with two short legs with four books on top of it. Three of the books are sitting straight up including two tall ones and a short one. The fourth book to the right is gray and is leaning against the third.