No-Limit Texas Hold'em: A Complete Course by Angel Largay is intended to be a comprehensive course on how to beat low limit no limit Texas hold 'em games.
The text is rather short at about 270 pages. It starts off with a background from Largay, how he got his start playing, the hardships he encountered, and then quickly goes into discussing strategy. It should be noted that Largay has experience teaching players as part of a poker school. There's quite a bit of very basic strategy such as how to recognize draws and odds, adjusting to low buyin games and their flow, game selection, player type breakdown, pre-flop strategy, and the last half of the book is post-flop strategy.
The content within is good, and it's more comprehensive and specific than a lot of theoretical texts from other publisherrs like 2 + 2, but this does create some controversy because people disagree about how some hands should be played and in some cases it takes a deep understanding of the game to understand fully what Largay is talking about. The book is definitely geared for live players. Though there aren't many books specifically written for online play only, most of them work for both online and live play. While the concepts presented in this book can be used online, it's going to be much more useful for a player starting out playing live.
No-Limit Texas Hold'em: A Complete Course is a decent beginner to intermediate level text on the game. Advanced players will not have much use for it, but it is a lot easier to read than any 2 + 2 book on the game, for better or worse.