Japanese CTF Challenge Collection Book

While visiting Japan for a couple weeks for the holidays, I decided to stop into a bookstore and see what kind of info sec books were available in Japanese, and I came across this CTF challenge collection book written by the organizers of SECCON.

I found it to be pretty neat. The required files are provided on the book's website, and there are walkthroughs as well as lessons on how to solve the challenges. I personally haven't seen any kind of book like this in English, so I'm looking forward to reading it and working through the challenges.

If you can read Japanese or just want to check it out anyway, here is a link to the Amazon.jp listing.