for young adults

c is supposedly adult, I would say rather see a very young adult young adult.
I was doing this kind of games is 15, ac is this is not "Agatha Christie" who made the puzzles (eg a small enigma page 112: supposedly it is an autograph letter of Voltaire, and you have an image with a book and a sheet or there is written VAULTERE) even my 4 year old daughter and begins to distinguish the letters would be able to tell the difference. in addition there are games or missing a paragraph in order to make the games (page 49)
g 2 stars set anyway because it's still a book of 113 pages games not counting solutions
you have to see if the buy or not.