https://en.wikipedia.org/wiki/Josef_Čapek
He wrote a wonderful illustrated children's book about cat and dog living together:
https://www.goodreads.com/book/show/19431013-all-about-doggi...
https://web2.mlp.cz/koweb/00/04/37/75/99/povidani_o_pejskovi... (originally published in 1929, so it's public domain, Czech version, but at least you can check the illustrations)
Sometimes both brothers wrote together:
https://en.wikipedia.org/wiki/Brothers_Čapek
Josef was actually the one who came up with the word "robot":
https://en.wikipedia.org/wiki/Karel_Čapek#Etymology_of_robot