Idea of Return Book Icon
The icon is shaped like a square with a rounded top left corner and two pointed corners located at the top and bottom right. The bottom left corner curves off to form a long oval shapes that runs the whole bottom of the square but doesn't close on the right side.
This Return Book icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.