If you ever wanted to read “Kalileh o Demneh” but you find the simple English version more accessible you can read it online:-
The real name of “Kalileh o Demneh” is Panchatantra and the fables go as far back as 2500 years ago.
According to Shahnameh Panchatantra was brought over from India by Borzuy, physician to King Anushirvan.
The story of how it entered the persian culture is fascinating:-