A classic is simply a book that stands to the test of time. It was read by our grandparents and will most likely be read by our grandchildren. They are read, studied, and enjoyed by a very diverse...
Classic books are like cult movies. They shape new concepts in our society, have something special to offer in an educational way. It is more these aspects of a book that make it a classic.. not how...
Some classics include "Wuthering Heights" by Emily Bronte, "The Old Man and the Sea" by Ernest Hemingway, "To Kill a Mockingbird" by Harper Lee, etc. Hope that helps