It's just my observation, but I feel that most books on business are essentially 75% filler. What I mean by this is that every author has a great premise and they get their point across in the first few chapters. But once that is achieved, they just repeat the same information over and over - just to fill 300 pages. I always have at least one book on the go, and this always seems to be the case. The only books that seem to break this mold are books by Jeffrey Gitomer, and Dan Kennedy to name two. These two gentlemen, discard the B.S. and just give you the information. Gitomer doesn't feel the need to write a big book of fluff, (his books are even small and a quick read).
I wish more business writers were more concerned with getting the information across and less interested in making sure their book "looks" serious at 300 pages. As a entrepreneur, I am just interested in getting the information. If I capture one nugget of wisdom that helps me to grow my business then that is worth $25. to me. I wish we could go back to the simple books of our childhood - one to twenty pages. Maybe I'll take on that challenge, when I put out the second edition of "The Reluctant Salesperson."