Just discovered this blog and found a freebie … Can’t be bad. All you need to do is provide an email address you can download the 379 pdf doc that is made up from thses books:
Mastering Exchange Server 2007
Chapter 2: Exchange Server Architecture
Chapter 6: Scaling Upward and Outward
Exchange Server 2007 Infrastructure Design: A Service-Oriented Approach
Chapter 4: Applying Planning Principles to Exchange Sever 2007
Exchange Server 2007 Implementation & Administration
Chapter 2: Exchange Server Administration
Chapter 4: Installing Exchange Server 2007
Chapter 12: Sizing Storage Groups and Databases
MCTS: Microsoft Exchange Server 2007 Configuration Study Guide (Exam 70-236)
Chapter 10: Creating, Managing Highly Available Exchange Server Solutions
MCITP: Microsoft Exchange Server 2007 Messaging, Design and Deployment Study Guide (Exams 70-237 & 70-238)
Chapter 5: Defining Policies and Security Procedures
Chapter 10: Planning a Backup and Recovery Solution for Exchange Server 2007
Chapter 15: Planning Exchange Server 2007 Security
Go get it, it’s free