Terry Pratchett! His books had a significant role in shaping my moral compass and are always a joy to re-read.

the hobbit is so cozy

Usually either Terry Pratchett if I'm in a more upbeat mood (Discworld only, as I haven't read any of his other books... yet. One day I'll broaden my horizons), or China Mieville otherwise (especially The City & the City).

The Hitchhikers Guide to the Galaxy has always been a favorite of mine.

Fanfiction is my go-to when I'm sick, or depressed, or really tired. Nothing beats its combo of easy-to-read and wildly absorbing.

Otherwise, I'm partial to cozy fantasy, like The Goblin Emperor by Katherine Addison.

Also the Murderbot books by Martha Wells never fail me.

Also... older books, with their wordiness and long sentences and lack of fear of semicolons, can be great for this. Virginia Woolf's books for example are so dense, and the atmosphere that creates is sublime, but the way she writes somehow makes her wordy prose also really easy to read. The sentences just kind of tumble you along. I love it.

Caveat being that older books, including Woolf's, contain shit like casual racism and sexism and etc, and sometimes I have more capacity to overlook that than other times. Which is one reason I love when modern authors write in a more old-fashioned style, like in Jonathan Strange & Mr Norrel by Susanna Clarke - it lets me have my cake and eat it too.

Poetry is also great a rainy day, including old poetry. It's underrated these days. I think it's partly from the pervasive modern idea that poetry is automatically "cringey", and partly from the elitism and other -isms among the Poetry Establishment^tm, and partly from English teachers taking the fun out of it. But you can rediscover poetry, just like you can rediscover a love of novels after highschool steals it from you for a while.

My personal favorite trilogy is His Dark Materials from Philip Pullman. It is somewhat forgotten these days but they are excellent in every meaning of the word.

Just about anything from the Discworld series by Terry Pratchett. Clever, insightful, delightfully sarcastic, but never mean-spirited.

And no matter how many times you re-read them, you always find something new.

A Psalm for the Wild-Built by Becky Chambers. There is a good sequel too called A Prayer for the Crown-Shy that came out last year.

Usually any kind of fantasy book! There are already good recommendations in this thread for those so I'll also mention books aimed more towards a younger audience, they tend to feel nostalgic and warm. Books like the classic editions of Alice's Adventures in Wonderland, Winnie-the-Pooh :)

I'm currently in a cozy mystery phase for reading, so anything by Jenn McKinlay and her aliases (Cupcake Bakery, Library Lovers, Hat Shop, Good Buy Girls, Decoupage) or Krista Davis (Diva series, Paws & Claws, Pen & Ink) are my go-tos.

For cozy days, I usually find myself gravitating toward some of my childhood favorites like the Edge Chronicles by Paul Stewart & Chris Riddell, Pendragon by D. J. MacHale, or the Last Dragon Chronicles by Chris d’Lacey.

Another vote for Terry Pratchett. I also find myself coming back to The Autumn of the Patriarch and A Hundred Years of Solitude over and over. They are not my favorite books, but they are sort of a habit, they're definitely the ones I've re-read the most.

a lot of mine are already listed here, but ill also offer up Stardust by Neil Gaiman

right now, it's 'Ascendance of a Bookworm'

It used to be Percy Jackson when I was a kid, but I think the re-reads have numbed it a bit. I also like to read 'Never Let Me Go' whenever I wanna get grounded and appreciate the simple joys of life

It depends on what “Cozy” means. If I want to reread a familiar story I’ve read a million times before, it’s Raymond Feist’s Riftwar books or Jim Butcher’s Dresden Files.

If however we are going for low(er) stakes come out feeling good, it’s all about feeling relaxed and enjoying friendships, Legends & Lates or the Fred the Vampire Accountant series are fun. I enjoyed the This Quest is Bananas series too.

Typically, that’s when I’ll read fanfic. Sometimes I’ll just look for the coziest mystery I can find available at my library or maybe reread Hogfather. Although I think Legends and Lattes will become one I put in my rotation when I need cozy vibes.

All Creatures Great and Small

I found Janet Kagan’s 1991 book ‘Mirabile’ in my library when I was a teenager, and it has been my favorite cozy read ever since. Gentle, good-natured science fiction focused on the biologists and adventurers managing the flora and fauna of a far-future terraformed planet, with lovely characters and an absolutely adorable romance between two middle-aged people. Can’t count how many times I’ve reread it at this point. The physical edition is out of print, but it’s available for around $5 in ebook form, and used hardback copies can be had for a reasonable price as well.

I only occasionally reread books. There's so much out there to read I'm always in search of the next thing. Lately if I'm not currently reading something I'll listen to a few chapters of different web novels on royal road until I find something I'm interested in. I use an app call voice aloud reader that converts text to speech. Frees me up to make food or do other things at the same time.

Currently reading Kafka on the Shore by Murakami.

I’d say right now A Portrait of an Artist as a Young Man by James Joyce. I love how most of the dialogue is internal and seems to shift from scene to scene very dreamlike. Other than that I just go back to reading some Greek myths.