I just need some good books to get for this upcoming summer.
I like fantasy, and have been known to read thrillers.
I'm not a fan of sci-fi, or adult romance novels, though.
Could anyone name some good ones for me?

He's with me
double helix( if you are into science)

If you haven't already, read the Bartimaeus Trilogy. After that, I can't really help you as I don't tend to favour anymore fantasy books after that. Those were the last books I read before I started reading horror and normal fiction. Though, if you're interested, I would suggest a numerous amount of Stephen King classics, or Catch-22 by Joseph Heller. It's a classic. It may start off very confusing, because Heller mentions events as though the reader has already read them, but once you're done you'll understand EVERYTHING. Trust me.

I will reccomend that you read twilight because its the best book ever!!!! And you said you like fantasy and this is fantasy!This is definitely a book you should read !
also if you enjoy twilight then also read new moon and eclipse ( part of the twilight series ). Plus the last book in the series is coming out this august, so since you said that you wanted a book to read during the summer , august is in the summer ! Well I hoped this helps!

Here are some of my favorites:

Neil Gaiman is an amazing author!

Edgar Allen Poe is a really good author. Check out his poems and short stories.

William Shakespeare is good too.

Any books by Scott Westernfeld or Neal Shusterman are really good too.

Any books by Amelia Atwater-Rhodes are amazing! There is In The Forest of The Night, Demon In My View, Shattered Mirror, Midnight Predator. And then there is the The Kiesha'ra series: Hawksong (the best in the series!), Snakecharm, Falcondance, Wolfcry and Wyverhail.

A Northern Light by Jennifer Donnelly

Blood and Chocolate by Annette Curtis Klause

The Princess Bride by William Goldman

13 Little Blue Envelopes by Maureen Johnson

Girl At Sea by Maureen Johnson

Abarat by Clive Barker, Make sue you get the hardcover version though!!! If you liked the first one be sure to check out the next book in the series Abarat: Days of Magic, Nights of War.

Daughters of Destiny series: Keeper of the Winds by Jenna Solitaire, If you enjoyed the first one check out the next three books in the series. Keeper of the Waters, Keeper of the Flames and Keeper of the Earth.

The Abhorsen Trilogy (Sabriel, Lirael, Abhorsen) by Garth Nix

The Maximum Ride series (The Angel Experiment, Schools Out Forever, Saving the World and Other Extreme Sports, The Final Warning) by James Patterson

His Dark Materials trilogy (The Golden Compass, The Subtle
Knife and The Amber Spyglass) by James Patterson

A Great and Terrible Beauty, Rebel Angels and The Far
Sweet Thing by Libba Bray

The Riddles of Epsilon by Christine Morton-Shaw

The Cry of the Icemark by Stuart Hill, If you liked this one, check out the next two Blade of Fire and The Last Battle of
the Icemark.

The Haunting of Alaizabel Cray by Chris Wooding

Inkheart and Inkspell by Cornelia Funke

The Thief Lord by Cornelia Funke

Holes by Louis Sanchar

The Sisterhood of the Traveling Pants series by Ann
Brashares

Dreamland by Sarah Dessen

A Mango Shaped Space by Wendy Mass

The Morganville Vampire series (Glass Houses, Dead Girls
Dance, and Midnight Alley) by Rachel Cain

The Inheritance Trilogy by Christopher Paolini

The Chronicles of Narnia by C.S. Lewis

The Hobbit by J.R.R. Tolkien

The Lord of the Rings trilogy by J.R.R. Tolkien

Impulse by Ellen Hopkins

Twilight, New Moon and Eclipse by Stephanie Meyer

Harry Potter series by J.K. Rowling

Nick and Norah’s Infinite Playlist by Rachel Cohn and David Levithan

All-American Girl by Meg Cabot

Uglies series by Scott Westernfeld

The Wind Singer, Slaves of the Mastery and Firesong by William Nicholson

Define “Normal” by Julie Ann Peters

The Perks of Being a Wallflower by Stephen Chbosky

Tuck Everlasting by Natalie Babbitt