I'm not entirely sure as I haven't specifically studied the 'rab se sona ishq' ending story in detail. It could be a story full of love, sacrifice and self - discovery perhaps.
I'm not sure specifically as I haven't read it myself. But usually novels with titles like this often revolve around themes of passion ('junoon') and love ('ishq'). It might be about a passionate love story between two characters, with all the ups and downs that come with such intense emotions.
Since I'm not familiar with the 'junoon se ishq tak complete novel', it's difficult to determine its theme. However, if we look at the title, 'junoon' means passion and 'ishq' means love. So perhaps it has a theme related to passionate love, maybe about the journey of love from the initial intense passion to a more profound and complete form of love.
Since I don't know the details of this story, I can't summarize the ending. But generally, in a love story, the ending could be either they live happily ever after, or they part ways sadly. Maybe in this 'rab se sohna ishq' story, it has a unique and touching conclusion related to their love, religious beliefs, or family situations.
A vampire novel related to 'ishq ki inteha' could be unique because vampires are typically seen as solitary and somewhat cold - hearted creatures. But when 'ishq ki inteha' is involved, it forces them to confront emotions that are alien to their nature. In such a novel, the love story would not be like an ordinary one. The vampire's immortality and their inhuman qualities would interact with this extreme love in a very special way. The power dynamics between the lovers, the fear of losing the loved one due to their vampiric nature, and the eternal nature of their love can all contribute to a very unique reading experience.
Since I'm not familiar with the 'dil ki nazar se khoobsurat' story, it could be about seeing beauty through the eyes of the heart. Maybe it's a story of a person who discovers the true beauty in others or things that are often overlooked by the ordinary eye, but this is just speculation.
You can try looking for it in local libraries. Some libraries have a good collection of novels, both popular and relatively unknown ones. They might have a copy of 'junoon se ishq tak full novel'.
I'm not sure specifically which vampire novels are directly related to 'ishq ki inteha'. However, there are many popular vampire novels in general, like 'Twilight' series by Stephenie Meyer. It has a strong theme of love which might share some similarities in the concept of 'ishq ki inteha' in terms of the intensity of emotions in relationships.