What is your all time favorite book you've ever read?

H.G Well's "The Time Machine!"

So far, I'd have to say "100 years of solitude" by Gabriel Garcia Marquez, "Veronika decides to die" by Paulo Coelho and "Peyton Place" by Grace Metalious. Other titles I've really liked are "Diaries of Andy Warhol" and "Naked Lunch" by William S Burroughs.

Right now, I'd say "To Kill a Mockingbird" by Harper Lee. I never get tired of reading it.

All Creatures Great And Small, and all the other James Harriott Books. It's interesting to hear how treatments were handled before the advent of penicillin.

My favourite three are,
I know this much is true by Wally Lamb,
The Unconsoled by Kazuo Ishiguro,
Fear of Flying by Erica Jong.
I think the most significant thing about my choices is that they are narrated in the first person, i.e, the person refers to themselves as "I" throughout the book. I prefer this method of narration.

I reread "To Kill a Mockingbird" every few years. Another book that I reread regularly is "The Man Who Was Magic" by Paul Gallico. On the surface, it's a child's almost-fairy-tale. but the more mature the reader, the more mature the underlying message becomes. Every few years, it tells me something new.

I'm going to top 10 this one - too hard to choose!!

1. The Outsider - Albert Camus (a little slow at the start, but it makes sense in the end. I really related to Mersault!)
2. 1984 - George Orwell (entirely engaging)
3. Animal farm - George Orwell (sugar coated social commenary - very well written!)
4. Brave New World - Aldous Huxley (fantastic book!)
5. A Clockwork Orange - Anthony Burgess (once you understand what they're saying, much better then the movie.)
6. Hitchhiker's guide to the galaxy - Douglas Adams (very funny, I recommend the whole series!!)
7. Acid House - Irvine Welsh (short stories, a little hard core, but very good)
8. And the Ass Saw the Angel - Nick Cave (a very dreamy romantic, disturbing tale)
9. Breakfast of Champions - Kurt Vonnegut (what a bizarre little book!!)
10. Pride & Prejudice - Jane Austen (why don't they make men like Mr Darcey anymore?)

Favourite book? Well, I definitely have a lot more than one favourite, so here's a few of the best I've read.

1) The Lord of the Rings -- J.R.R. Tolkien
2) The Man in the High Castle -- Philip K. Dick
3) The Invisible Man -- Ralph Ellison
4) One Flew Over The Cuckoo's Nest -- Ken Kesey
5) The Hitchikers Guide to the Galaxy -- Douglas Adams
6) Alice in Wonderland -- Lewis Carroll
7) The Clour Purple -- Alice Walker
8) The Princess Bride --William Goldman
9) Daniel Deronda -- George Eliot
10) Northange Abbey - Jane Austen

Got to agree with you Tanzen on "1984". Started off a little slow for me, but once I got into it, that's all I did for the next two days.
I just started Vonnegut's "Timequake". Very poignant and HISTERICALl. Already on my list. "Ting a ling"!
"Moby Dick" is also deserves mention. Get's rather boring in the middle, but throughout is the best written story I've read.
Geez, there's others too, limiting this to one is tough!

tanzen,
I couldn't agree more about A Clockwork Orange. I've never looked at milk the same since, lol. I hated the movie, maybe this is 'cause I don't much care for Stanley Kubrick.

My favorite books:

Dune - Frank Herbert
Lost Souls - Poppy Z. Brite
Threshold - Caitlin R. Kiernan
A Caress of Twilight - Laurell K. Hamilton
Tales of Pain and Wonder - Caitlin R. Kiernan
Midnight Blue - Nancy A. Collins
Wuthering Heights - Emily Bronte
Do Androids Dream of Electric Sheep? - Philip K. Dick

Hard to pick just one

The Lord of the Rings -- JRR Tolkien
Rendezvous with Rama by Arthur C Clarke [there are 3 sequels too, all good]
The Silmarillion by JRR Tolkien [If only to learn all those little tie ins and facts from before LotR]]
The Man in the High Castle -- Philip K. Dick[Most of Dick's books are cool]
Hitch Hikers guide to the Galaxy by Douglas Adams
Cabal by Clive Barker

You have never heard of my favourite piece of literature. It's a pseudohistorical novel "Queens Don't Have Legs" by the Czech author Vladimir Neff. It's funny and intelligent and moving, but I don't know if it has been translated into English.
My 2nd favourite book is "In Watermelon Sugar" by Richard Brautigan.

I don't know how I could possibly pick one book out of so many but...If I was stranded on a desert island with only one book, I guess I'd like to have the Oxford English Dictionary!

"To Kill A Mockingbird" Very unoriginal but it is my favorite book. Every time I read it I pick up something new. And I'm far ahead of my class that has to mandatorily read it since I've already read it.

Another one of my favorites is "Number the Stars." Very low reading level, but high intensity book. Halacaust. Very dramatic. I absolutely adore it.

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Either The Hitchhikers Guide to the Galaxy by Douglas Adams, or The Eyes of the Dragon by Steven King

My Top Ten:
1/ all-time-favorite: IT by Stephen King
2/ great suspense novel with an incredible plot twist in the end: THE COFFIN DANCER by Jeffery Deaver
3/ my favorite from the series: HARRY POTTER AND THE PRISONER OF AZKABAN by Joanne K. Rowling
4/ the book on which my favorite movie was based: INTERVIEW WITH THE VAMPIRE by Anne Rice
5/ a German one you won't know, I fear: DREIZEHN (Thirteen) by Wolfgang & Heike Hohlbein
6/ a really wonderful book: THE GLASS LAKE by Maeve Binchy
7/ scary, eerie, spooky, and very suspenseful: THE CLUB DUMAS by Arturo Pérez-Reverte (on this book was the movie "The Ninth Gate" based)
8/ another German one - very suspenseful: DER VEREHRER (The Admirer) by Charlotte Link
9/ German again: AZRAEL by Wolfgang Hohlbein
10/ one of her best novels: THE PALE HORSE by Agatha Christie

I tried to name each author only once, or else I would have listed ten Stephen King novels here...

My three favorite books are all young adult fiction. But there are some other genres.
1. "Lily" and it's sequel "Looking After Lily" by Cindy Bonner(hence my screen name. Not to say that Lily in the book is silly....Never mind)
2."Someone Like You" by Sarah Dessen
3. "Night Companions" author's name escapes me but it's three names that all start with "V" Vivian Something Something
I really liked "To Kill A Mockingbird" and "Jane Eyre" and also "Wuthering Heights" *sigh* I'm just a huge bookworm!

Top 5, in no particular order:
The Grapes of Wrath
Clan of the Cave Bear
The Fifth Sacred Thing
Stranger in a Strange Land
Farenheit 451

ShadowHippie

My favorite books are:

1. The Clan of The Cave Bear
2. The Valley of Horses
3. The Mammoth Hunters
4. The Plains of Passage
5. The Shelters of Stone
6. Cujo
7. The Exorcist
8. Elvis and Me
9. Born Free
10. Living Free
11. Forever Free
12. The Spotted Sphinx
13. Pippa's Challenge
14. The Queen of Shaba
15. My Pride and Joy
16. Little Lost Angel: The True Story of The Murder of Shanda Sharer
17. Two of a Kind: The Case of the Hillside Stranglers
18. Jaws
19. Search for The Green River Killer
20. The Lion, The Witch, and The Wardrobe
21. Small Sacrifices
22. In a Child's Name
23. Evil Angels
24. Growing Up Brady
25. The Dingo Baby Case

Mind you, these are in no particular order!

Not an easy question but here's my top ten in no order -
Sarum - Rutherford
Of Mice And men - Steinbeck
Stark - Ben Elton
All Douglas Adams - trilogy in 4 parts?
Chicken Hawk - Robert Mason
The Power Of One - Bryce Courtney
The Sum Of All Fears - Tom Clancy
Most People I know - Billy Thorpe
Jonathon Livingston Seagull - Douglas Adams
Angelas Ashes - Frank McCourt

It changes, but I can probably narrow it to three:

Middlemarch by George Eliot
Pride and Prejudice by Jane Austen
Screwtape Letters by C.S. Lewis

The Little Prince
Alice In Wonderland and Through the Looking Glass
Memoirs of a Geisha
Lord of the Rings triology
All of Edgar Allen Poe
Shakespeare's Midsummer Night's Dream
Hamlet
Richard III
King Lear
The Prophet
Old Possom's Book of Practical Cats
Gone with the Wind
L.Frank Baum's Oz series
Atlas Shrugged
The Fountainhead

It's not difficult to pick just one: I cannot explain how strongly I was captivated by "Too loud a solitude" (not sure about the English title) by Czech Bohumil Hrabal.

Also among the best:

The Tunnel - by Antonio Sabato
The Brave Soldier Shveik(???) - by Jaroslav Hasek
100 Years of Solitude - by Gabriel Garcia Marques
The Woman of the Dunes(???) - by Abe Kobo
Fahrenheit 451 - by Ray Bradbury

My favorites in no particular order and my spelling with no particular accuracy:

The Hunt For Red October - Tom Clancy
The Parsifal Mosaic - Robert Ludlem
Presumed Innocent - Scott Turrow
The Stand - Stephen King
A Short History Of A Small Place - T. R. Pearson (very funny)
Foxe's Book of Martyrs - John Foxe (made this old man cry)
C.S. Lewis' Screwtape Letters as mentioned by Skylarb above blew me away - he had such an amazing understanding of the human condition.