Monthly magazine and Ubuntu Server 実践バイブル
Also I've got a "Ubuntu Server 実践バイブル" - it means "hey, you should put review to the web!!!" - okay, hito. I'll do so! :)
It probably targets "beginners" but "practical" as named and worth for non-beginners, too. If you want to try set up servers, this would help you a lot. However, if you just want "Copy & Paste" thing, this book is not suitable for you. google it (but we cannot assume search result as best suitable one, and most of that lucks "why you should do this operation", of course). This book shows process of thinking and background for set up servers.
I like "conclusion first, then show its reason and other methods" style, but sometimes not in this book, it frustrated me a bit. But anyway, explorations may be fun.
This book doesn't cover "cloud", but he says "if sales is good, I'll write about it". I'll be glad to review it.