You`ll know Servlets and JSPs so well that you can pass the Sun Certified Web Component Developer (SCWCD) 1.4 exam. Maybe you don`t care about the exam, but need to use Servlets and JSPs in your next project. You`re working on a deadline. You`re over the legal limit for caffeine. You can`t waste your time with a book that makes sense only AFTER you`re an expert (or that puts you to sleep).