A quick categorial update

I have updated the downloadable PDF of Introducing Category Theory from Version 1.0 to Version 1.1, and I have also uploaded the corresponding new PDF for printing the paperback. But the latter could take a little time to percolate through Amazon’s system. The main difference is that I have simply deleted the old §5.3 (and trivially relabelled what was the final subsection of §5.2 as a new §5.3). Why the deletion? Because of an annoying/amusing/silly glitch pointed out by Matthew Bjerknes. I explain in the footnote to the corrections page for Version 1.0.

A gentle hint. If you have bought the paperback, and do like the book, it would be a kind thought to leave a (nice!) rating, if not a mini-review, on Amazon. And indeed, even if you haven’t splashed out, if you are one of those who have downloaded the PDF (over a thousand downloads so far, though who knows how many individual downloaders there are!), then — assuming you do have an active Amazon account — you can still leave a review. But then it is probably best to start along the lines of “I have read a PDF version of this book, and …”.

As noted before, the printed version of the book is priced, within a rounding error, at the very minimum that Amazon will allow, giving me a royalty of about 3p a copy (that’s pence, not pounds!). So positive ratings won’t make my fortune; however, they might help to spread the word to those suspicious of books without recommendations.

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