At the end of his war with Ravana, Rama had Hanuman to raise and train a contingent of warriors who would take birth multiple times on Earth, to contain the demons. Aishani and Adheesh are two such warriors, blessed with divine weapons and powers to fight the world’s evil at present times.
These tales, as you can probably figure out, include Gods (not much of Goddesses), sages, kings (but not much of queens), king’s daughters (princesses), and their husbands (mostly princes), curses, boons, sacrifices, animals who can talk, royal marriages, friendships, pride, demons, herdsman, ghosts, fairies, and mortal humans.
Consider these books to be three parts of a giant puzzle. Without one part, it’s just incomplete. Some parts might just not make sense.