I have several books of his works, and I especially love his minutia, like woodcut prints of pine forests and his drawings of Italian castle ruins.
He also did cool prints of bacteria to commemerate Van Leeuwenhoek on Dutch currency
Thomas Kincade is another such artist. I love his paintings.
Classic book discussing the meaning and importance of his work:
https://www.amazon.com/G%C3%B6del-Escher-Bach-Eternal-Golden/dp/0465026567