There are five main ways to learn all about Business through reading books:

1. The Success Manual: Encyclopedia of advice
Encyclopedia of advice - It contains concise summaries of 100+ greatets busines bokks, advice from business gurus and experts and more. $14.95

2. The Personal MBA
It suggests a list of 80+ books that you can read to master the essentials of Business.

3. 10 Day MBA by Steven Silbiger: A Step-by-step Guide to Mastering the Skills Taught in Top Business Schools $11

4. 30 Day MBA: Learn the Essential Top Business School Concepts, Skills and Language Whilst Keeping Your Job and Your Cash $19
Book from Kogan Page

5. 1 DAY MBA - Master Basic Abilities: The BOOK $100
Every 1 Day MBA course features interactive online lessons, powerful success tools and other guides.

Read more on this topic
Do we need MBAs - The Presentation
The Manager's Bible: 100+ Things That Every Manager Should Know

You may want to read The Success Manual, The Encyclopedia of Advice. A list of all the articles in the series on one page can be accessed here.