There's a comment with a curl command for that on the repository.
I'm totally fine with having our book available for free; actually, I prefer it that way. Yet I find it a bit odd that Springer never even notified any of the authors. I suppose as copyright owners, they can do that.
I know that it is rare for modern programming books to make much money for their authors. Thus I imagine for a highly specialized math book it would be even rare.
I haven't kept track of the grand total that I made off the book, but it would certainly be a rather crappy used VW Golf.
I am so far removed from academia now that I have never thought about how I would publish a book like that today. My first impulse would be to make it a free ebook. Web search for "free course textbooks" indicates that this is not unheard of. Does anyone know how common it is, at various levels of higher education?
Free would be great! I think a lot of students go the alternative route and torrent books or just Google to find their respective .pdf's without paying after they see the price tag at the campus store/amazon/ebay.
What does this mean for publishing in general? 10 years is not much time for good technical books.
Really? It's Dec 31th, so you managed to make the book non-free again.
Now, if I have even a passing interest in a book, I download it and read the introduction. If I like it, I get it from the library. If I like my first reading, I buy the book.
The two things that have increased the range of my intellectual interests in 2015 have been libgen and twitter (where people more interesting than me talk about their research with others).
I don't personally have a problem with this, but others may want to keep that in mind.
In America (the only country I'm familiar with), people are sued by the RIAA or MPAA for copyright infringement. I've never seen a pattern of lawsuits for pirating books. So there's very little risk of getting caught.
If someone has a moral problem with my piracy, I'd reply that I'm a paying member of my local library and I purchase far more books than the average person. If someone has a moral problem with them personally pirating, I'd suggest trying it out. You'll be so happy that you'll retroactively justify your behavior. Like me!
 Exceptional cases like Aaron Swartz (who downloaded 1 million+ Jstor articles) do not a pattern make.
I'm personally of the belief that locking up knowledge behind paywalls is a terribly backwards thing to do, but that's modern capitalism for you. I just wanted to call it out because some people are a lot more bothered by copyright infringement than others.
Does anyone know if there any backup/mirror links available, just in case that hosting server shuts down?
Here the link to the 2nd edition (it also has the first edition in the collection):
More on category theory --but more for a programmer's usecase-- here:
What I'd like is a proper introduction so I can start learning properly. Any book one would recommend? I'm keen on buying if it's not on the Springer list. Thanks in advance.
Other introductory books I've found very useful are the 'Dover Books on Mathematics' introductions series, I've found their graph theory and topology books rather concise and clear to read -- to my knowledge they're availible at archive.org in the collection 'folkscanomy mathematics'.
This search yields 110 041 results across all disciplines covered by springer that should be free to download in complete. Only 11 451 books from the same time range are 'preview-only'.
I'm not certain that this is intentional. I haven't found any statement by Springer that they make available all ebooks older than 10 years. Does anyone know more?
On my own experiences, if you're willing to put the hours in, the prospects are pretty good. Maths isn't magic, and I found there wasn't much at the standard masters level that couldn't be at least managed (if not mastered) with significant but not superhuman effort.
I've no idea about math GREs; I'm in the UK.
As for the bigger life direction question, I have no idea without further context.
Labeling them or adding " (first edition)" to the title would've been nice, though.