Do you have a book recommendation to share with us? If so, please be sure to sign your recommendation like this: (suggested by Victoria Windsor)

Science Fiction
George's Secret Key to the Universe Trilogy by Stephen Hawking and Lucy Hawking
The Airborn series by Kenneth Oppel
Ender's Game (Also fantasy(?) and adventure)
The Hitchhiker's Guide to the Galaxy, by Douglas Adams (a comedy series, with a sci-fi base)
Maze Runner series by James Dashner
House of Night series
Maximum Ride series by James Patterson
Divergent by Veronica Roth
Neuromancer by William Gibson
Artemis Fowl by Eoin Colfer
The Legend series by Marie Lu
A song of Ice and Fire series by George R.R. Martin
Uglies by Scott Westerfeld (with distopia)

The Delirium series
The Hush hush series (Also Adventure, Fantasy and Action)
Pride and Prejudice by Jane Austen
Easy by Tammara Webber
The Fault in Our Stars by John Green
A Matter of Magic(ish more adventure) by Patricia E Wrede
The Selection series by Kiera Cass
We Were Liars by E Lockhart
Twilight by Stephanie Meyer
Basically everything written by John Green

Life Of Pi by Yann Martel (Also fantasy)
The Divergent series by Veronica Roth (Also action and romance) (This is dystopian fiction, in the vein of "The Hunger Games.")
Harry Potter by J.K. Rowling
Thirteen Reasons Why
The Silverwing series (Kenneth Oppel)
The Percy Jackson Series &
The Kane Chronicles series &
The Heroes of Olympus series by Rick Riordan
39 Clues series by many different authors, such as Rick Riordan, Gordon Korman (Also has some mystery)
The Lord Of the Rings Trilogy by J.R.R. Tolkien
The Hobbit by J.R.R. Tolkien

Urban Fantasy
Elemental Assassin Series (Jennifer Estep)

The Outsiders
The Hunger Games by Suzanna Collins
The Iron fey series by Julie Kagawa
Alex Rider series by Anthony Horowitz
Agent 21 (Chris Ryan)
Cherub series by Robert Muchamore (Jefferson)
The 39 Clues by Various Authors

Dystopian Fiction
Shatter Me by Tahereh mafi
Brave New World - Aldous Huxley (suggested by Wesley)
Legend by Marie Lu
Matched by Allie Condie
The Selection by Kiera Cass
Divergent series by Veronica Roth

Courtship and Curses
Betraying Season (All by the same author)
Bewitching Season
The Three Musketeers, by Alexandre Dumas
The Gemma Doyle Trilogy by Libba Bray

The Innocent Mage series
Artemis Fowl by Eoin Colfer

Mystery/Detective Stories
Catch me by Lisa Gardner
Sherlock Holmes series by Sir Arthur Conan Doyle
Hercule Poirot series by Agatha Christie
Miss Marple series by Agatha Christie
The Boy Sherlock Holmes by Shane Peacock
All the Wrong Questions by Lemony Snicket

I am Malala by Malala Yousfazai and Christina Lamb
Angela Merkel: The Chancellor and Her World by Stefan Kornelius
An Astronaut's Guide to Life by Chris Hadfield

The Hunchback of Notre Dame by Victor Hugo
Les Miserables by Victor Hugo
A Tale of Two Cities by Charles Dickens
A Christmas Carol by Charles Dickens
1984 by George Orwell
Anne of Green Gables by Lucy Montgomery
To Kill A Mockingbird by Harper Lee

Outliers by Malcolm Gladwell (suggested by Fatima Jangda)