These books are suggestion. You do not have to read them all.
For students going into the:

Eighth Grade: 
The Count of Monte Cristo by Alexandre Dumas
The Life and Death of Adolf Hitler by James Giblin
The True Confessions of Charlotte Doyle by Avi
Little Women by Louisa May Alcott
Of Mice and Men by John Steinbeck
The Grapes of Wrath by John Steinbeck
Fahrenheit 451 by Ray Bradbury
The Time Machine by H.G. Wells
A Tree Grows in Brooklyn by Betty Smith
War of the Worlds by H.G. Wells
Free the Children by Craig Kielburger
The Slave Dancer by Paula Fox
A Wrinkle in Time by Madelaine L’Engle
Where the Red Fern Grows by Wilson Rawls
The Call of the Wild by Jack London
Hatchet by Gary Paulsen
The Last of the Mohicans by James Fenimore Cooper
I am Malala by Malala Yousafzai
Number the Stars by Lois Lowry
To Kill a Mockingbird by Harper Lee
A Raisin in the Sun by Lorraine Hansberry
The Boy in the Stripped Pajamas by John Boyne

*Note: These books are just suggestions and you do not have to read them all.