Mastering essential pre-university physics has been slightly revised. The revised edition has a red cover to distinguish it from the initial version (green cover). All the exercises (and answers!) are the same except that J4 ("Energy and Nuclear Reactions") is now done to more significant figures in the new, red version. Both versions can be answered on line - take care selecting the correct version.
	Mastering essential pre-university physics is in its second edition with 4 added pages of A-level skills (Snell's Law, and thermodynamics). All the exercises (and answers!) are the same as in the newer, red version of the first edition. All versions of J4 can be answered on line - take care selecting the correct version. Additionally there are 28 pages of introduction to isaacphysics problem solving skills, that is "Developing Problem-Solving Skills" by Dr Lisa Jardine-Wright.