What genre/author do you find is the easiest to jump into and read for a couple of minutes here and there, rather than requiring a longer period of sustained focus?

I'm guessing a lot of people who have a goal to read more will at some point try to do the whole "replace scrolling with reading" thing. But something I've learned is that not all books can do that as effectively. Not all are equally easy to jump back into for a brief couple of minutes. A more challenging fiction book (I've never read one of his, but like Tolstoy, I imagine) definitely takes a little more effort and focus to properly read, so doing it quickly here and there, or in a distracting environment, may not be so easy. Same with a technical nonfiction book.

But of course fun, "brain candy" books are really great for this. There's no spin up time to remember where you were, you don't have to mull over ideas or passages to get anything out of it. It doesn't even need to be pure junk "brain candy"; really any fiction that is more fun than challenging.

I've also found that episodic nonfiction like some biographies (eg. Masters of Doom, a book about the creators of the video game Doom) are a bit easier to jump in and out of.

I'm curious what other sorts of genres/authors you trend towards when you're looking for something that doesn't require a proper sit-down-and-focus session, but rather something you can read while standing in line for 5 minutes, or waiting at the doctors, or that sort of thing.