It’s a matter of personal preference. I’ve always been interested in the storyline in Heroes. It’s interesting to buy a book as a continuation of a series you love, but in this case, it’s completely different. Old names appear, but it’s impossible to understand how they ended up there. I wouldn’t read such a book, or I would read it, but not as a continuation. The spirit of Heroes is not a genre (there are many games in that genre), not units, not buildings. The spirit of Heroes lies precisely in the storyline (IMHO).
Everyone has their own opinion, and that cannot be changed.