This is the Regał na książki icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
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.