I wouldn't recommend reading this book as anything but a learning resource. The stories are really short and the writing often uses what I'd call a cliché literary language. It should be a comfortable read at N2 level.
A collection of short stories with a twist ending that's suppose to surprise you or catch you off guard. Unfortunately, if you have been using the internet long enough, you'd have heard or read most of the short stories in here already in a much shorter form like an interesting facebook status or a forwarded mail.
The book seems to collect many of those very very short interesting stories from the west and add spices to it by making it longer. But if you've read those already, it's so obvious that they are unnecessarily extended in order to misdirect you so you'll be surprised by the ending. There are some good stories in here, but I found the poor attempt to extend the story boring. It isn't fun when you bet everything on the twist and the reader already know what the twist will be by the second paragraph of the story.
To practice my Japanese, I read this book of short stories. I read several other Japanese books this year, too, but apparently I can't add books anymore on Goodreads, so I can't add all of them. This one was a bunch of translated short stories, including things like The Monkey's Paw and other familiar tales, and some I was unfamiliar with. One I vividly remembered reading when I was a kid, so it was really fun to reread it now as an adult in another language.