Corrections

Many thanks to all those who have told me about typos and worse, and suggested needed corrections. I hope that the latest printing will prove less error-prone than the earlier versions as a result!

So if you are using the fourth printing, 2009:

But if you are using the corrected second printing, 2008:

Finally, if you are still using the original 2007 printing (or the rogue third printing):

Sorry this is a bit complicated — but  of course, the easiest thing is to ensure that you and/or your library do have the current printing (and jolly cheap it is too!)