Errata
These are our responsibility and we regret there are some. Look at it positively: here's your chance to win a free beer.
First Edition: No beer here now. The changes to be made are here.
Second Edition: Find an error in the current print that's not known to us already and we'll send you a beer, somehow, and add it to the list which we'll no doubt start soon (for a start, some of the code was retyped (why?!)).
