Books about writing tell you you need to hook your reader by the end of the first 3 chapters. Really? Doesn’t that seem a bit long to you? I mean, if the first paragraph bores you, what are the chances you’ll read the second one? Or even buy the book?
Every paragraph should pull the reader to the next one. Every sentence should entice and draw the reader deeper into the book. Else, why read the next sentence, even?