A few days ago, we caught wind of Ferrari’s$30,000 book and engine sculpture offering. If for nothing else, the book was a flex in audacity on the part of the Italian automaker. But as it turns out, Ferrari isn’t the only automaker that’s floating an opus of its own. British automaker Bentley is in on the fun, as well. Its book, called the Bentley Centenary Opus, is a celebration of the company’s 100th anniversary, and while it doesn’t have a price tag yet, it does have its own attention-grabbing quality: it weighs 30 kilos, which converts to around 66 pounds.