Dive summary: 

• The library of books on advertising is extensive and can be confusing; industry leaders share their top twelve recommendations for books every advertiser should read. [see full list at Digiday]
• The "father of advertising" David Ogilvy's book Ogilvy on Advertising tops the list for Darryl Ohrt, founder of Mash+Studio.
• The Copywriter's Handbook is a useful guide for any advertiser, not just copywriters, as all ad professionals should be able to write eloquently and persuasively. 

From the article:

"There are a lot of books out there on the advertising industry and marketing. A lot of industry execs pump out books on how to win at X,Y, and Z.

We decided to ask some seasoned ad industry executives about what they think should be required reading for everyone in the industry. Here is a list of 12 books they think you should add to your library and read if you haven’t already."