Yep, they're legit!
http://www.amazon.com/exec/obidos/se...R.R.%20Tolkien
On Harper Collins in EPUB, PDF, LIT, and MOBI:
http://www.harpercollinsebooks.com/8...34&SortBy=date
Unfortunately the "trilogy" book is not yet available on Amazon. Harper Collins site says all the books will be available on April 20.