30 in 30 recommendation ratings

For anyone reading along this month, these are what the letter recommendations for each "30 in 30" book mean:

RECOMMENDATION: (see list below)

• A (Must Read)
• B (Entertaining, worth a read)
• C (Runs the Bases, nothing more, nothing less)
• D (Poorly Done, but there is learning here)
• F (Poorly Done, Don't bother)