Ask Lemmy

The End of Eternity (Asimov) might be short enough for you, and has some interesting ideas about the implications of time travel.

Rn I'm currently rereading The Inheritance Cycle, it's fantasy, but it goes very in depth, there are your different races, elves, "orcs", dwarves, you got dragons, there are different languages that the author made, its very good. Of course I might be biased since I'm rereading it rn lmao

Edit: I did not read the bit about reading it in a day. I guess you could if you read fast

If you're into short stories the Illustrated Man by Ray Bradbury is a good one.

And while I didn't read much Issac Asimov myself my wife, who loves reading but dislikes sci-fi, read one of his books (Foundation) in a day and said he's an excellent writer.

I would recommend checking out audio books as a medium for reading. It allows you to increase the speed to whatever works for you, so 2x for me, and listen to a lot more in a day. It also frees you to listen at any times you have nothing cognitive happening, so dishes, washing, cleaning, etc.

As for single day books, the first book of the Bobiverse series by Dennis E Taylor. I loved the whole series including the recently released 5th book and the first is only 9.5 hours at normal speed, so about 4.75 at double speed.

Also All Systems Red is the first book in the Murderbot series by Martha Wells. The perspective of a SecUnit, a type of sentient cyborg, which has hacked its own programming and removed its limiters so it can act freely. This means no guard rails, no rules, no limits, which results in lots of TV shows being watched and avoiding humans. It is snarky, fun, and interesting. It comes in at 3.5 hours normal time, so 1.75 at double speed.

I have just the book for you!... Ah, finish in a day, nevermind.

The Locked Tomb series is refreshing. It’s weird, it’s fun, it’s dark, and it’s trash, but it’s trash that the author is having fun with.

Discworld is also just amazing

Recommend high quality short stories. Edgar Allen Poe has a collection that is some of the most thrilling, mysterious and fun, imaginative, adventurous, grotesque and other depending on the story. https://www.amazon.com/Edgar-Allan-Poe-Complete-Collection/dp/1453643141

Robert Louis Stevenson was also a fantastic writer of short stories.https://www.amazon.com/Complete-Short-Stories-Robert-Stevenson/dp/030680882X

I like short stories sometimes as I can't commit to a larger read.

The Lady Astronaut series by Mary Robinette Kowal. The first book is called The Calculating Stars. Basically, an alternate history where (spoiler for the opening chapter)

spoiler

a meteor wipes out the east coast and kick-starts climate change, causing the Space Age to start 10 years early.

It follows a Jewish computer (a woman who literally runs calculations for NASA, as seen in Hidden Figures) who wants to become an astronaut, and her struggles with the racism and misogyny of the 1950s.

I reccomend hopping on [email protected]

I second someone else suggestion: the murderbot diaries. It's great.
Most of the books people here are recommending are fairly lengthy, but you can get through the first murderbot book in a dedicated evening.

"The Theory and Practice of Oligarchical Collectivism" is a hell of read, as well as "The Navidson Record".

But "The Necronomicon" is my favorite fictional book, I think.

Others may have mentioned it (happy to see Terry Pratchett getting a lot of love), but would definitely recommend anything by Vonnegut! Love his writing style and his approaches to humor and world building. Slaughterhouse Five is a great one, as is Sirens of Titan.

Also, not certain how well they hold up, but I really enjoyed the Redwall series back in the day! I was much younger at the time, though.

Robert Silverberg's "The man in the maze" is a cool science-fiction book based on the Greek play Philoctetes. Iirc it's a very short story (maybe about one or two hundred pages), I don't remember the exact length but I recall reading it in one sitting. It is a very character-driver story where the "maze" itself is an allegory about mankind, isolation and disability, but it is very much enjoyable as a casual read as well.

The protagonist ("man in the maze") is an astronaut who has been somehow cursed to always radiate its emotions in such a way that others, even his family, find repulsive, so he self-exiles to a remote and long-dead planet to live the rest of his life in isolation. But when an alien species makes hostile contact with humans, he is needed again, as his "curse" is the only way to properly communicate with them and maybe convince them that humans are sentient beings and thus their equals.

Best? Hard to say. But favorite?

Galactic Pot-Healer by Philip K. Dick. It's quite short, like many of his books, and you could absolutely knock it out in a day.

"Best" often is a literary work that can be slow to read and/or very long. You want stuff that is short and quick, which is fine, I read a lot of fanfiction for that purpose. But I'm going to recommend Pohl and Kornbluth's "The Space Merchants" and their other short novels from that era (1950s). Their cynicism is absolutely prescient. The Space Merchants is about a world run by advertising agencies. A quick read while hard hitting.

Completely ignoring your "short enough to finish in a day" instruction, try out Worm

"Short enough to finish in a day" seems pretty tough for me, but maybe I read slowly.

Short story books are good for casual reading in short sessions. Robot Dreams by Asimov, or Welcome to the Monkey House by Vonnegut. I used to carry each of those around and read a short story while waiting at a restaurant or at the DMV or whatever.

I really liked Altered Carbon. Approachable sci fi with drugs, violence, sex, politics, and of course high tech ideas like flying cars, AI hotels, digital consciousness.

Not sure if I'd say they hit hard, but for readability it's hard to beat Rex Stout's Nero Wolfe books. Some of the best murder mysteries I've ever read, so much fun.

A couple of my favorite books are probably longer than a day’s read:

• Sirens of Titan - Kurt Vonnegut (319p)
• The Watermelon King - Daniel Wallace (240p)

The Heart Shaped Box

NOS4A2

Between Two Fires

The Troop

The Princess Bride

Edit: Just realized you're looking for something to finish in a day, my bad. Have your read any Sherlock Holmes? They're entertaining and you can get through quite a few stories in a day.

When I was young, I read Diane Duane's The Young Wizards series, and I remember I loved it. Also Artemis Fowl, Sherlock Holmes, and The Inheritance series (C. Paolini). As an adult, I've read the LotR series which I highly recommend. Also, The Expanse series, 1984, Chronicles of Narnia.

Short enough to finish in a day...hmm that's tough. Maybe Screwtape Letters by C S Lewis? The Martian. Lots of short stories out there by Isaac Asimov!