Supernatural: Book 1: The beginning of a long road

The plot of the series is supernatural, but with the addition of a new character and possibly characters in the future. Namely from the series The Vampire Diaries, and to be more specific, Elena Gilbert (well, in the first seasons will be only her, and there will be seen). I'll be honest, I was inspired by another story on the same topic, but the author of that story abandoned it in 2018 (ah fuck it's been 7 years, with the way time goes you can really go crazy) In general, the plot is actually the same as in Supernatural, but how will Elena enter the story? She does not know who she is, or rather does not remember who she is, she only knows that she is somehow connected to Sam Winchester and she needs help from him and from Dean, as well as they need her help.
Yes, as you have already understood between Sam and Elena there will be a kind of love line going through the whole series, about the love triangle Sam/Elena/Dean I have not decided yet whether to make it real or just in the fourth season Sam will start to think about it and in the end he will be defeated, but we still need to get to the fourth season. The first two chapters are the trailer and the cast. Most likely there will be gifs in the chapters, we'll see.