Yep, they're legit!
http://www.amazon.com/exec/obidos/se...R.R.%20Tolkien
On Harper Collins in EPUB, PDF, LIT, and MOBI:
The Trilogy
Fellowship of the Ring
The Two Towers
The Return of the King
The Hobbit
The Children of Húrin
Unfortunately the "trilogy" book is not yet available on Amazon. Harper Collins site says all the books will be available on April 20.
EDIT: It is now.
EDIT: They are also available on
Fictionwise with a 100% credit.