A quiet, repetitive book

It doesn't have to be "Meditations from the Mat" (though that's a nice one). For me, right now, it's reading a chapter of the manga "What Did You Eat Yesterday". But it also doesn't have to be that book, since the reasons that make it a nice off-ramp to the day are generalizable:

1) The chapters are short,
2) They're fairly calm, hardly any conflict,
3) They follow a recognizable pattern,
4) The characters are conscientious and kind to each other,
5) Since there are many volumes, I can expect that I'll keep getting a little variety,
6) There's no inside or outside pressure to finish or read faster,
7) It's low-tech and quiet, the pages are black-and-white,
8) It's free because I order the books from the library,
9) And finally, I gently forward to it!