A second grader highly recommends the Goosebump series. If you like books with a little bit of a scare in them give the series a try!
Some tips for finding a book:
Ask your friends what they like to read.
Ask your parents and family members what their favorite books were at your age.
If you don't like a book it is okay to put it down and try another one. Not everybody likes the same kind of books!
If you are at the library or a bookstore ask for suggestions from the librarian or bookstore clerk.
Check out the websites of your favorite authors they may recommend other authors that write like they do.