Heya,
So a lot of you all are confused with the order of the books. Elite Hearts is the first book according to timeline. It is when Adhyant, Aviraj, Adhiraj, Abhiraj, Ivaan, Divyansh, Vedika, Meher, Shreya, Kashvi and Kainaat are 18 and in their first year of Aster.
This is when the girl and boys attend school together. After that will be Convenient Hearts- Amira and Devraj's story. And then the order will follow. Once all eight books are finished, that is when Raha will start. Raha already has a lot of mysteries and secrets in it. Which is why it is a trilogy.
Elite Hearts might be long since its a multicouple. But the other books are only going to be 30 and at most 40 chapters long. But you will not have to wait that long for Raha.
I will start the story whenever majority wishes as the main plots of the other love stories do not impact the happenings of Raha at all.