Sorry, I could not find a book source by Jefimenko, you might try
Adventures Unlimited or Borderlands ( http://www.borderlands.com ).
Electrostatic motor;
http://www.physics.umd.edu/deptinfo/facilities/lecdem/j2-51.htm
Geometry of an electrostatic motor;
http://www.magsoft-flux.com/Products/software/flux3d/moespo.html
Some papers by Jefimenko;
http://webpages.marshall.edu/~walker/pubsElectrostatics.html
Booklist including Jefimenko;
http://www.microtronics.com.au/~gwatson/paper-widup.html
Heckuva good science demo page;
http://www.physics.umd.edu/deptinfo/facilities/lecdem/demolst.htm
-- Jerry Wayne Decker / jdecker@keelynet.com http://keelynet.com / "From an Art to a Science" Voice : (214) 324-8741 / FAX : (214) 324-3501 KeelyNet - PO BOX 870716 - Mesquite - Republic of Texas - 75187