Coo, thanks MathWonk and Solaris for that recommendation - looks great.

I used to have a lovely physics textbook (distinguished by being relatively short* and not wasting any words) but right now I can't for the life of me remember enough details to find it, and I don't have it any more as I lent it out and never got it back... Will edit later if I can.

*no pun intended

Email: my username, followed by 2, at google's mail