Wonder, by R.J.Pallacio
Transall Saga, by Gary Paulson
Shadow, by Michael Morpugo
Land of Stories (series), by Chris Colfer
Frindle, by Andrew Clements
Axxis and the Golden Medallion, by Tim Murari
Detectives in Togas, by Henry Winterfeld
The City of Ember, by Jeanne Du Prau
The Giver, by Lois Lowry
And here are some easier reads for reluctant readers. These are great for kids ages 7 to 9, but also work well for older readers who need some easier reading material.
The Sherlock Sam series, by A.J. Loh
All About Sam, series by Lois Lowry
The Year of Billy Miller, by Kevin Henkes
The Chocolate Touch, by Patrick Catling
George and the Big Bang (series), by S. Hawking
I would also encourage kids to read non-fiction. If your child is not wild about fiction, find him/her some books about a subject that he/she is very interested in -- this could be anything from a book about great white sharks to Sachin Tendulkar's autobiography. The ideas is just to get your kids reading, one way or another!