Though his staff is often confused by the way he runs the office, I've found that there's 'method in his madness'.
The book lacks 'method'. [=the book is not arranged in an orderly way]
He claims to have developed a new 'method' for growing tomatoes.
(..) That's honor enough for a lifetime. You'll give us the names? If I didn't give them to you in a concentration camp... ...where you had more persuasive methods at your disposal... ...I certainly won't give them to you now. What if you track them down and kill them? What if you murdered us all? (..)1942 Casablanca