Hello codeforces !
During my readings searching , I've found an excellent book called "Looking for a challenge?" , here's The official site of the book where you can find a book preview .
Unfortunately they're not printing it anymore ,I've searched through amazon & ebay and didn't find any copy to buy .
I was wondering if anyone of you has any idea where can I buy a copy ? Thanks in advance .
I had sent them an email a few weeks back asking the same question. They told me they would be releasing a new issue in the beginning of 2016.
Have you tried to search in any online shop that might be selling it ?
Yes, the book is quite difficult to obtain.