I cam across this and noticed its not in http://www.tolkienbooks.net/ so I thought I would post it here.

It contains "Riddles in the Dark" and seems to have been published by three different publishers in a short time frame:

https://www.amazon.com/Over-Rainbow-Ta ... collsguid-20&linkCode=osi

http://www.goodreads.com/book/show/74 ... f_Fantasy_and_Imagination

http://www.goodreads.com/book/show/74 ... f_Fantasy_and_Imagination