A must read for any Digital Enthusiast : The BIM Managers Handbook
The BIM Manager's Handbook: Guidance for Professionals in Architecture, Engineering and Construction
I must say its a hell of a read and really defines the rules of BIM and how BIM has been implemented in the AEC industry. I would definitely recommend this if you want to get a good understanding in BIM, whether you want to become a BIM Manager or just an employee in the AEC and want to gain understanding. I would suggest you read this book.
Here is where you can get it from: