(TrendHunter.com) September was National Library Card Sign-Up Month, and OverDrive pledged to donate 50 cents (up to $10,000) to the National Forest Foundation for every Instant Digital Card that was created on the... (TrendHunter.com) September was National Library Card Sign-Up Month, and OverDrive pledged to donate 50 cents (up to $10,000) to the National Forest Foundation for every Instant Digital Card that was created on the...