PUZZLES
Overall I like them and the more I progress through them they seem to get better. Sure we all run through some of the same frustrations.....5 for correct, minus 20 for incorrect....solve in 8 seconds and only get 5 points.... finding a solution that they say is wrong but you still get the material in same number of moves but that is very rare. It gets better the more you progress. Books? That is ancient. I like that I can play games and puzzles on my phone which I always have with me and ca access 24/7.