Steppenwolf, by Hermann Hesse
Siddartha, by Hermann Hesse
Harry Potter series
Metamorphosis by Kafka
The Sorrows of Young Werther by Goethe

I've read the Harry Potter books at least twice each, the Lord Of the Rings about seven times, including once out loud to my 9 year old son, (took about 3 months of bed-times), the Fionavar Tapestry trilogy by Guy Gavriel Kay, and The Hotel New Hampshire by John Irving. Oh, and several of Kurt Vonnegut's novels.
I've also read The Gruffalo to my little girls so often, I no longer need the actual words in front of me .

The Thief of Always by Clive Barker. I bought and read the comic adaptation on a whim are the time it was being published by IDW (I think) and haven't looked back. Immediately devoured the novel when I finished the comics and have re-read it several times since.

Long list. Off the top of my head...

Harry Potter Series
Honor Harrington series by David Weber
Eve Dallas Mysteries by J D Robb
Robot series by Isaac Asimov
Trader Tales by Nathan Lowell
Callahan's Crosstime Saloon series by Spider Robinson
Liaden Universe series by Sharon Lee & Steve Miller
Miles Vorkosigan series by Lois McMaster Bujold

[avoran]

Pretty much anything by James Herriot - they're sometimes funny, sometimes touching, always life affirming - the only books I've ever re-read multiple times

the host
fountainhead

The Hunger Games (series) by Suzanne Collins
Divergent (just the book because the next 2 in the trilogy don't really entertain me) by Veronica Roth
Vampire Academy + Bloodlines (series) by Richelle Mead
The Darkest Minds (series) by NOT ALLOWED
Throne of Glass (series) by NOT ALLOWED

[Isildur71]

The Lord of the Rings trilogy at least once yearly
Outlander series by Diana Gabaldon (I reread when a new book comes out)
A Song of Ice and Fire
War and Peace

Ender's Game

I have read the six books from The Longsword Chronicles more than once. Liked it very much

Kate Daniels series by Ilona Andrews
Charley Davidson series by Darynda Jones
The Hobbit by J.R.R Tolkien
The Adventures of Huckleberry Finn by Mark Twain
Artemis Fowl Series by Eoin Colfer
Blood Singer series by Cat Adams

The Red Tent by Anita Diamant,
The Bean Trees by Barbara Kingsolver, any Barbara Kingsolver really.
The Tea Rose series by Jennifer Donnelly
Forever Amber by Kathleen Winslor
Snow Flower and the Secret Fan by Lisa See

- Call of the Wild. Because it's awesome.
- Journey to the Center of the Earth. Because it's awesome.
- The Harry Potter Series
- The Percy Jackson Series
- The Heroes of Olympus Series (waiting for the Blood Of Olympus!!!)
- Making Faces by Amy Harmon.
- To All The Boys I've Loved Before by Jenny Han.

[moonprincess]

Miles Vorkosigan series by Lois McMaster Bujold is my all time favorite. True escapism for me. I read them three times so far.
Temeraire series by Naomi Novik. Another favorite. I read this three times so far as well!
The Black Magician trilogy by Trudi Canavan.
The Parasol Protectorate by Gail Carriger.
Jack Kursed series by Glenn Bullion.

[Bookbanshee]

This Shining Land by Rosalind Lakers
The Carradyne Touch by Anne McCaffrey

Before I started bookswapping and reading E-Books, I read both books about once every other year. The Dragonriders of Pern (whole series) used to be another favourite. And then of course Harry Potter.

Nowadays I listen to the audio books of Harry Potter (read by Stephen Fry) when I feel down or sick.