There are some books that require more than one glance. I re-read them, quite a number of times. There's also the pleasure of savouring the contents, in case, it is written by one of my favourite authors.
I tend to read them again and again. When, i think, i need some change in my schedule(especially during test, exams). It's easier to read such stories, as you already know the plot. And you can halt, whenever you want. It provides relief to a tired mind.
I thought that this habit of mine was strange. Apparently, father also practices this. I've seen him reading Yashvant Chittal's Purushottama ample number of times. The same holds good with me with respect to A Fine Balance by Rohinton Mistry, The Secret Garden, Robin Cook's Coma, Ruskin Bond...
I expressed my thoughts to a professor at my department. His take was that i could rather read fresh unread stories than read the same over and over again.
But, i'd rather prefer the satisfaction that i obtain on re-reading, during times of stress, than turning the pages of a new book.