I have only read two books that fall into this category:
A Random Walk Down Street, which is a pretty popular one that flogs index investing while giving some intro investment knowledge and history. I listened to it on audiobook and enjoyed it.
The Millionaire Next door, which you mentioned, and which I loved.
Some books on my vague to-read list:
Flash Boys
The Intelligent Investor
Getting Things Done (very tangentially related, but I added cause you mentioned 7 Habits)
plus two textbooks:
Principles of Corporate Finance by Brealey, Myers & Allen
Options, Futures and Other Derivatives by Hull