很少给书籍评低分，但这本当之无愧！
The Title should include "...for xcode-3"
The book may be great for xcode-3 but it can't be used for xcode-4 there should be a clearly visable diclaimer. If you search for Xcode-4 on Amazon you get this book, which implies its the latest and greatest.
Buried in the discription the write-up says xcode-3 but it's hard for a new user that is "Beginning iPhone 4 Development" to notice the difference. The screen-shots are totally different: unfortunately the text references the screenshots throughout making it unusable.
If you are a new developer and using Apple's new tool DON'T buy this book...it will only confuse you.