Book recommendation thread (w/ a wee train and *new LV4* flash gib!)

Greetings! I recently finished Ernest Cline's Armada and it reminded me of how much I love reading. When I was much younger I would tear through multiple books in a week. Now I'm lucky if I finish a couple books a year.

I'm heading on a 5 month vacation in January, so I thought it may be a good time to pick up some decent reads and load up my Kobo Aura. I'm looking for recommendations of your must read/favorite novels/short stories/manga/graphic novels, etc.

A quick round up of some of my favorite books that I've read (in no particular order):

Ender's Game
A Song of Ice and Fire
Tigana
Oryx and Crake
Preacher
LOTR
Maus
Day of the Triffids
Alas Babylon
The Sandman
The Watchmen
Dune

Thank you kindly for your help and here's a little train (closed for now!)for your troubles.
I'll add some flash giveaways randomly over the next few days as I'm able to:

Thanks for the quick responses. I already have some great suggestions! Flash Gib #1 <-over (I'll add some more tomorrow!)
Flash Gib #2 - LV3 <-over!

Flash Gib #3 -LV3 <-over!

Flash Gib #4 - LV4 <- A shadowy gib! (Closed)

*Edit 2 -> Thank you everyone for the amazing suggestions! It's going to take me some time to follow up and make a master list, but I definitely will. I really appreciate the time everyone took so far. I'll add some more gibs as soon as I'm able, as a token of my appreciation.