I got this back in December as the Kindle First pick. I chose it specifically for it being a short book. I read a ton and it's nice to have a shorter story every now and again. For being only 155 pages, it packs a punch! It is a great mystery and doesn't lack in details. The characters are great and the transfer between 500 years ago and the present are very clear so there's no confusion. The puzzle of the code was very interesting. Fast paced without losing too many details. I would be interested in reading the rest of the series if they're ever translated into English. I imagine there's new adventures in store for the characters. I enjoyed it didn't really have one main character, but several and each played a part in the mystery. I would recommend this for anyone who enjoys mysteries/thrillers. The short length makes this a quick read - great for enjoying in one afternoon!