House of Leaves has more than one element that makes it a special book and that you could call gimmicks. The most apparent and well known is it's strange formatting in numerous pages to drive up the emotions of the story and reflect the spacial anomalies of the house. Some pages are upside down or sideways, they might have a single line of text, have missing information, amongst other rugpulls. Another gimmick that is always perpetuated by fans is the word house always beimg written in blue, no matter where it shows up on the book (you can see it in the cover for example). The academic language in Zampano's writing, constant use of footnotes, the trio of protagonists and deliberate mixing of hidden clues amongst dead-end information that has caused the fandom to ruminante over this work for decades can also be called gimmicks. If you can't tell, I adore this book. The liminal space craze can be traced back to it as well.
Adding the link here since it looks like someone else posted the wrong link House of Leaves https://www.amazon.com/dp/0375703764
That's not the book This is the book House of Leaves https://www.amazon.com/dp/0375703764?ref=ppx_pop_mob_ap_share
Interesting, I hadn't looked that deeply into it. This is the version I have and I was pleased. Its full color. https://a.co/d/2ZblQ3D
