Brief, almost photo-journalistic style coverage of the Winchester rifle, traced from its early uses in the middle of the last century, through developments to date, is offered in Firearms by Winchester. Photos of the manufacture of the big guns, of their uses in hunting big game, and of the men who use them should appeal to boys. Authentic information, approved by the Department of Defense on the latest weapons, vehicles, rockets and research at Army Proving Grounds, Aberdeen, Md., is offered in Firing Line. Leatherneck sits in on the controversial training which prepares a recruit to be a U. S. Marine. The work of the Soil Conservation Service in combatting erosion, flood and rangeland devastation through overgrazing is traced in Soil Savers. Large photographs are an integral part of this series. Good introductory books, which of necessity touch the surface with capsule commentaries.