Ebook: Cocoa Programming Developer's Handbook

I'm still working my way through this book. It's very thick, but so far, I've gained a solid base of knowledge on what Objective-C can do. The example code is excellent and not full of errors like some programming book's code I've bought. My only concern is that I've skipped ahead and the base is all you get really. It's up to you to fill in the blanks, and decide what to get next to learn more about Mac|iPhone programming. I'd recommend a good Cocoa book to go with this.