Others that gave 1 star (and I agree, I would love to give a negative rating) have said it all, but to strentghen their efforts in warning others, here's my contribution: this book contains a childish idea, average high-school level of writing, and a few pages copied from history books.It is certainly one of the worst books I have ever read. And the only reason I'll try to remember the names of the authors of The Rule of Four is to avoid their next book.