I'm gonna say something kinda controversial so feel free to disagree with me, especially the fans of those fandoms, but the reason why the magic trilogy books failed is very simple to me: Marvel envisioned something the fans didn't want. I'll explain:
Oh to realise that the man that you love is never going to love you back and only has his heart set on that one redhead and that you cannot compete with her… Morph it’s time you look for another man #XMen97