This is an interesting article about rereading favorite children's books (which I do often--the
Betsy-Tacy series,
Anne of Green Gables, and one of my all-time favorites, mentioned here,
Emily of New Moon:
http://flavorwire.com/518840/why-do-...n-we-get-older
I do also reread favorite adult books, mostly as comfort reads, I think.