615dsjiz3blI found this book in a branch of Cash Converters in Lisbon. Actually, scratch that – I found the 1966 edition in a Cash Converters in Lisbon. However the cover of mine is rather beaten up so I borrowed this image from Amazon. You can go buy that edition from Amazon if you wish – that’s not an affiliate link, by the way, as having moved out of the UK they don’t let me do that any more. But I digress…

The early chapters of the book are fairly easy to follow. This is probably because there’s not a lot of change in quite a lot of time, and it’s fairly easy(ish) to document that for the general mathematically ignorant (such as me). Generally speaking even my high level of mathematical ignorance is capable of coping with zero, and negative numbers and so on.
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