Shoot-N-Release;
"Lefever, Guns of Lasting Fame" was the first book, Published by Robert (Bob) Elliot, copyrighted 1986.
"Uncle Dan Lefever, Master Gunmaker" is the upgraded one, also published by Bob Elliot, 2001. This latter one is the one to get.
Rabbit;
Other than buggering a screw head, or the possibility of chipping long set wood there is no concern to taking the side plates off any Lefever I am aware of. Earlier version do have the sears & springs attached to the plates, but the little adjusting screws keep them contained. On these though you should let down the hammers prior to removing the plates, so the sears are not engaged.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra