[its_the_future]

I won't know who Hakan Kjellerstrand is, but if you quote him you should either put [sic] following "suites" or put [suits] instead of it. Gives a bad impression straight off the bat. You could argue language is different from programming but to my subconscious mind it speaks of a lack of attention to detail and excellence.

[nurettin]

If you search for constraint programming examples on the internet, you will eventually end up on his web page.

[jonsen]

If you zoom you can see he is a coauthor of the book in the upper left corner.

[hakank]

Thanks for the report. The typo is now fixed.