Business books (most good writing actually) are frontloaded. The first paragraph tells you the gist, the first page the important ideas, the first chapter most of what the book has to offer. The rest is there to go into detail and support that first chapter with facts arguments and anecdotes.

But here’s the kicker: you often won’t fully grok the first chapter if you don’t read the rest. (or don’t already know it from other sources)