Originally Posted by DCPoorGuy
do the entertainment book coupons - the paper ones - apply to any fare and any route?
i know the electronice ones suck but i never tried the paper ones
You may not yet have realized it, but your question is answered in as much detail as is really possible in the links and statements in the posts above.
For allowable fares, read the info in the link
http://www.entertainment.com/save/travel/united.
For routings see the above discussion about domestic only round trips, open jaws and circle trips.