Magic Circle Council Chairman Brian Sibley has been involved in many radio broadcast dramas and written many books over the years, but few are as highly regarded as his momentous adaption of Tolkien's trilogy Lord of the Rings first broadcast on the radion on the BBC in England in 1981.
The BBC has just re-released the multiple CD set starring a multitude of the best British actors:
http://www.amazon.co.uk/The-Lord-Rings- ... =8-1-spell
And here it is on amazon.com for much less:
http://www.amazon.com/Lord-Rings-Dramat ... 160283492X
You can read about it on Brian's Blog here:
http://briansibleysblog.blogspot.com/20 ... earth.html
And read here where Brian tells the story of the production at length:
http://briansibleytheworks.blogspot.co. ... on_23.html
As a fan of British radio drama, I would highly recommend it, however it has been declared the definitive adaption of Tolkien's works by many before me.