Don't get this book if you are really looking to make the boat go. The book is too generic to be of use. Yes, guys, I have the book on my shelved as well. The book does not deal with squaretop sails and does not focus on the interaction between downhaul, mainsheet, squaretop and prebend and this is exactly what you need to read and learn about to make the modern rigs go.
Wouter