I read Ramona Quimby, Age 8 by Beverly Cleary until my copy was completely falling apart.  (Mine looked like the middle picture at the top of this blog.)  My absolute favorite part was when Ramona theatrically cracks a hard-boiled egg on top of her head . . . except it wasn't hard-boiled.  Ramona Quimby, her family, and her neighborhood friends have delighted readers since the first title was published in 1955.  They also earned a couple of Newbery Honors and a National Book Award.  So, yeah, they are definitely classic -- old but awesome.  Add one (or all eight!) to your summer reading list!