PeteHall said:Arguably, MU4 is still the best book to keep in the glovebox of the car for quick reference while you are out and about.
MU5 is obviously prettier and contains a few new caves
Awesome, thanks for the info. I'll get myself copy of MU4 then while I wait (impatiently) for MU6 or the slim hope that a copy of MU5 appears from the aether