Designed to help competitive bridge-players to recognize where they go wrong, this book examines various mistakes in bidding, declarer play and defence, and divides them into the worst, the commonest and those that may be forgiven.
This author uses conventions I don't use, not sure if they are dated or just different, so a fair amount of the book doesn't work for me. I did like some of the opening lead discussions, but overall found it a bit challenging to read as far as 'readability'.