These are the ones I used to read over and over as a child:
The Secret Garden (Frances Hodgson Burnett)
The Little Prince (Antoine De Saint-Exupery)
The Witches; Matilda (Roal Dahl)
The Lion, The Witch and The Wardrobe (C S Lewis)
My son's favourite among these is The Little Prince and of course The Gruffalo, which he pulls out of his little library shelf at least once every couple of weeks for a bedtime read.
Sacred, we also started reading the ebook version of The Adventures of Travelling Piglet together, the first book, very nicely written I must say!