Plus all the games and associated merch which came out; for the first book/movie there was a PC game (also released on PlayStation), some board games, some other toys, all of which added to the hype train because kids were surrounded by it. No other children/YA book series had that much merch for it - there are no Percy Jackson board games or 10+ video games for A Series of Unfortunate Events. Harry Potter grew up with the internet and capitalised on all the kids moving from real toys to chunky PCs to gameboys to xboxes etc
Plus all the games and associated merch which came out; for the first book/movie there was a PC game (also released on PlayStation), some board games, some other toys, all of which added to the hype train because kids were surrounded by it. No other children/YA book series had that much merch for it - there are no Percy Jackson board games or 10+ video games for A Series of Unfortunate Events. Harry Potter grew up with the internet and capitalised on all the kids moving from real toys to chunky PCs to gameboys to xboxes etc