Eventhough I'm not working in this field, the first part about fishing for client and how to manage an advertising agency was really useful and as he said could be implemented for all kinds of design offices. The rest of the book was an interesting insight on advertising industry in the 60's. Reading it was like glimpsing a view to an extinct world. Although the general principle might still be valid, I doubt the guidances mentioned inside are still in use. His insistence on presenting as much facts and testimonies as possible in an ad for example couldn't be found anywhere else today except on weight reducing product's advertisement. I also have never heard the tip of only reading the text written on the presentation material and to deviate at your own peril.