YA Fantasy (?): Fantasy based book. Book within a book, where 2 people fall in love via the annotations. Published this year?

[rowan]

Okay so I’m not 100% sure on the exact plot of the book as it’s actually one I’ve never read (only heard about from an old classmate who I no longer have contact with) but from everything I know
- It’s a fantasy novel that has been annotated by 2 characters, I’m pretty sure they fall in love too?
- It was quite popular on BookTok for a while a couple of months ago
- It was sold on its own website and I believe around the $30 price mark?

[Kate (Feathered Turtle Press Reviews)]

S.?

[Erika]

How to Lose the Time War by Amah El-Mohtar and Max Gladstone?