I bought this book after watching a series of videos on YouTube that mentioned it:
The book has a short introduction and then jumps straight into the question pool for the general class amateur radio exam. For each question, you have the four potential answers, followed by an explanation of the subject and the correct answer. Because the questions and the answer are so close, you might need to use a piece of paper to cover the answer while you think about the question without spoiling it.
I did my study mostly by watching the video and using https://hamstudy.org but the explanations on that website, sometimes, leave a lot to be desire. For quite a few questions, reading the explanations in this book helped a lot. It also has extra snippets of information spread throughout the book that are very nice.
Another positive thing about this book is that it’s full color. It has pictures but most importantly, diagrams and chart making use of the color range to make the information more accessible. Even though I know by heart some of that information, I find myself hopping they would make posters of these charts so I can hang them on my shack: they are beautiful and informative.
Oh… one more thing, I passed the test. Well, I passed the three tests in one sitting.