I bought the book because, coming from the Acol world, I wanted insight into five card majors. This book precisely hit the spot. It's a great summary of the background cloud of bridge assumptions that American bridge players have all grown up with. With larger than average print the book documents these assumptions precisely and clearly. This bidding culture has also updated for the 21st century, insisting that weak twos, Stayman and transfers are all basic, must have's, even for rubber bridge players.
Recommended - except if you're a good player who already knows Standard American, because in that case you don't need it.