Royalty-Free Textbook Photos, orientation: horizontal, minimum size: 4k, dominant color: gray, sorted by aesthetic score
- 4896x3264 Public Domain
- 1776x1184 Public Domain
- 4724x3543 Public Domain
- 4754x3062 Public Domain
- 5616x3744 Public Domain
- 3872x2592 Public Domain
- 4451x2958 Public Domain
- 5676x3784 Public Domain
- 6000x4000 Public Domain
- 4608x3456 Public Domain
- 4431x3323 Public Domain
- 6000x4000 Public Domain