The Effective Executive by Peter Drucker Review

These examples are old enough for us to see whether a decision regarded as brilliant is still brilliant or has it started to strangle the company (Drucker himself points out some cases, like GM's reorganization being brilliant for its time, but something which needs to change for it to move ahead).

The author, Peter Drucker is sometimes referred to as "the founder of modern management".
He has 39 published books and was well known for his consulting work with management, working with large companies (such as IBM and General Motors).

It's just 174 pages.