Joseph Hall blogs about his read of Ubuntu Hacks, he sees it as okay, but not fantastic
Read it here
I've read many an O'Reilly book in my time, and this one certainly didn't make it to the top ten. But it's far from being the worst one either. It's certainly better than one of those yellow and black books, that assumes you to be some sort of dummy merely by virtue of purchasing the book. It won't treat you like an idiot, but you may feel a little like one when you hit the heavy stuff. Don't worry, Kindergarten wasn't always a piece of cake either. But you survived that, and now just about everything you learned there you probably take for granted now. With the help of this book, you'll soon be taking much of Linux for granted too.