Hi M vijitha,
I'm not sure what you mean by "could not see any books on Aesop's fables books," but you can buy Value Bundle 3 (Aesop's Fables Vol. 1 & 2) from the BrillKids Shop. You may choose to buy the "download only version" of the Aesop's books so you don't have to pay extra for shipping (the download only versions are meant to be used in the Little Reader software).
Here's a direct link to the Value Bundle 3 page in our shop: https://user.brillkids.com/onlinestore/value-bundle-3.php